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Table of Contents
1. Important Safety Information ............................................................ 2
2. Specifications ................................................................................... 2
3. In The Box
........................................................................................ 4
4. Features .......................................................................................... 5
5. Components and Controls
................................................................. 5
6. Button Operation ............................................................................. 6
7. Battery Charging Instructions .............................................................6
8. Installation
....................................................................................... 7
9. Startup & Standby ............................................................................ 9
10. Focusing
........................................................................................ 9
11. Status Bar Overview ...................................................................... 10
12. Zeroing
........................................................................................ 10
13. Calibration
................................................................................... 11
14. Photographing & Video Recording ..................................................12
15. Measure Distance......................................................................... 13
16. Ballistic Calculation
....................................................................... 14
17. Quick Menu ..................................................................................16
18. Main Menu
.................................................................................. 16
Operation Mode...................................................................16
Wi-Fi ................................................................................... 18
Bluetooth
............................................................................ 19
Palettes ............................................................................... 19
Display Settings
.................................................................... 19
Scene Mode ......................................................................... 20
Profile ................................................................................. 21
Media
..................................................................................22
NUC Shutter .........................................................................22
MIC ..................................................................................... 22
Menu Sorting ....................................................................... 23
Compass Calibration
............................................................. 23
Prerecord .............................................................................23
Auto Sleep
........................................................................... 24
Pixel Correction .................................................................... 24
Time/Date ........................................................................... 25
Language ............................................................................. 25
Reset Settings
...................................................................... 25
Erase Media ......................................................................... 25
About
.................................................................................. 25
19. Connecting to ZEN LINK App .......................................................... 25
20. Firmware Upgrade ........................................................................ 26
21. File Transfer to PC
.........................................................................27
22. Maintenance & Cleaning ............................................................... 28
23. Troubleshooting (FAQ)
.................................................................. 28
24. Legal & Compliance .......................................................................28
25. Caution
........................................................................................ 29
26. Contact & Support
........................................................................ 30
2
1. Important Safety Information
1.1 Environmental Warnings
● Avoid direct exposure of lens to intense light sources such as the
sun or lasers.
● Operating temperature: -20°C to +50°C
● Do not store at extreme temperatures.
● When used in extremely cold environments, the battery life of the
device will be reduced. This is normal and does not indicate a
malfunction of the device.
1.2 Ergonomics and Handling
● Take breaks during extended use to avoid eye fatigue.
● Keep out of reach of children – small parts may be hazardous.
● After using the device, please close the lens cover of the device to
prevent sharp objects from scratching the lens of the device.
● Disassembling or repairing equipment through unofficial channels
will invalidate the repair warranty.
1.3 Battery and Charging Safety
● Use only with manufacturer-approved 18650 batteries.
● Do not reverse battery polarity.
● Only charge between 0°C and 50°C.
● Never leave batteries unattended during charging.
● When the device is idle for a long time, the battery should be
removed.
● Do not use 18650 batteries with USB charging interface, as it will
damage the device charging compartment.
2. Specifications
Series
MEGA
Product
CQ25R
Detector Type
VOx Uncooled
Resolution
640 x 512
Pixel Size
12µm
Framerate
50Hz
Spectral Range
8~14µm
3
NETD
≤18mK
Safety class for
laser
Class 1
Wavelength
905nm
Max. measuring
range
1200m(1312 yards)
Measurement
accuracy
±1
Min. measuring
range
5m(5.47 yards)
Objective Lens
25mm,F0.9
Field of View
17.5°(H) x 14°(V)
Close-up Range
5m(5.47 yards)
Detection
Range
1500m (1640 yards)
Optical
Magnification
Monocular mode: 1.7×
Scope mode: 1.4×
Helmet mode: 1.1×
Clip-on mode: 1×
E-Zoom
Monocular mode: 1.7~13.6×
Scope mode: 1.4~11.2×
Helmet mode: 1.1~8.8×
Clip-on mode: 1×
Palettes
White hot/Black hot/Iron red/Tint...
Start-up Time
<5 seconds
WiFi, Bluetooth
& Mic
Support
Sensors
Built-in accelerometer and digital compass
Built-in
Memory
64GB
Display Type
OLED
Display
Resolution
2560*2560
Battery
1*18650
Max. Battery
Life
8 hours
USB Interface
Type-C
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Size
153.5 x 76.5 x 50mm(6 x 3 x 2 inch)
Weight
365g(12.87 oz)
Housing
Material
Magnesium
Protection
Level
IP67
Operating
Temp
-20°C~50°C (-4°F~122°F)
Storage Temp
-40°C~50°C (-40°F~122°F)
Max. Recoil
1000g/0.4ms
3. In The Box
Battery Charger
USB Type C Cable
Battery case
Quick-release Picatinny mount Lens Cloth
Type C Cable Battery cap
Angled helmet eye visor
T20 Torx key
T25 Torx key Power adapter
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4. Features
● High-sensitivity thermal sensor
● Multi-Role Capability
● AMOLED display with adjustable brightness
● Multiple thermal palettes
● Built-in microphone and video recorder
● Prerecord
● Multiple zero profiles
● Pixel correction utility
● Wi-Fi & Bluetooth enabled
5. Components and Controls
1 2
3
4
5 6 7 8
9 10
6
No.
Component
1
Battery cover
2
Lens focus knob
3
Laser rangefinder
4
Eyepiece
5
Palettes button
6
Menu button
7
Capture button
8
Objective lens
9
USB-C port
10
Power button
6. Button Operation
CQ25R
Button
Short Press
Long Press
Quick menu
Main menu
Measure distance
Clipon ：Switching palettes
Scope,Helmet, Monocular: Zoom
Take a picture
Start/stop recording video
+
NUC
7. Battery Charging Instructions
Compatible Battery:
Supports only manufacturer-approved 18650 lithium-ion rechargeable
batteries.
control the charging power to enable fast charging.
Charging Steps:
1. Insert Batteries:
Place the 18650 batteries into the charger, matching the correct
polarity (+/−) as indicated.
2. Power On:
Connect the charger to a USB power source using the included
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USB-C cable.
3. Monitor Charging:
Charging status and battery level are displayed on the LCD screen.
The screen shows real-time voltage, charging progress, and battery
condition.
4. Important Notes:
Do not reverse battery polarity.
Do not use 18650 batteries with a built-in USB port.
Only charge between 0°C and 50°C.
Remove batteries when not in use for extended periods to
maintain battery life.
Avoid overcharging or leaving the charger unattended.
8. Installation
Installation Method 1:
Helmet Mode requires the installation of an optional helmet-mounted
Picatinny rail on the device.
Installation Method 2:
Before installation, clean the base of the device and the mount for the
MEGA Series using a lint-free cloth.
The MEGA Series mounts are available in two height options: 1.5 inches
and 1.7 inches, with part numbers ZT-AC0215 and ZT-AC0217, respectively.
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The part number for the Quick Release Mount is ZT-AC02.
● Align the mounting holes on the device and the mount for the
MEGA Series.
● Insert and tighten the screws.
● Mount the device onto the Quick Release Mounts and close the
latch.
● Tighten the screws.
The final result is shown in the image below:
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9. Startup & Standby
Powering On:
● Set the DIP switch to the “ON” position.
Powering Off:
● Set the DIP switch to the “OFF” position.
Standby Mode:
● Set the DIP switch to the “S” position.
● Auto standby available in menu settings (3–10 min).
10. Focusing
Objective Lens Focus:
● Rotate the focusing lever until the target image is sharp. Refocus as
the target distance changes.
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11. Status Bar Overview
NO.
Description
1
Tilt Angle
2
Pitch Angle
3
Profile
4
Zoom Ratio
5
Wi-Fi
6
Bluetooth
7
Scene Mode
8
Operation Mode
9
NUC Shutter
10
Power Supply Mode
11
Time
12. Zeroing
MEGA series features a unique “Freeze” zeroing method. The steps are as
follows:
● In the main menu screen, choose profile.
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● Select the zeroing function to enter the zeroing screen. The
coordinate position of the reticle (X axis, Y axis) is displayed in the
center of the screen.
● Set Up a Stable Shooting Position: Find a stable shooting position,
such as a shooting bench or sandbags, to rest rifle on. Consistency
is key for accuracy.
● Fire a Shot: Fire a single shot at a chosen target. Aim for the center.
● If the bullet hole and the aiming point (the center point of the
reticle) dose not match with each other, keep the aiming position
still. Do not move the reticle.
● Make sure the center of the reticle is on the aiming point. Then
press “Freeze” to freeze the screen.
● Press the menu button to toggle between the x and y axes, then
use the up and down buttons to align the crosshair with the bullet
hole from their shot.
● Press and hold the menu button again to exit the main menu and
save the setting.
● Shoot Again: Fire another shot at the same target after adjusting.
● Confirm Zero: Consistently hit the target at the desired distance, to
make sure thermal scope is zeroed. shoot a few more rounds to
ensure accuracy and consistency are achieved.
13. Calibration
NUC (Non-Uniformity Correction):
● Auto: Triggered regularly by device.
● Manual: Long press Palettes button.
● External: Close lens cap, long press Palettes button.
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14. Photographing & Video Recording
Take Photo:
● Short press the shutter button → brief freeze with photo icon.
Note:
Make sure the device is properly zeroed before activating the virtual reticle
function.
Record Video:
● Long press Capture button → recording icon and timer.
● Press again to stop.
RAV Mode:
● Automatically records 10 to 30 seconds before and 10 to 30
seconds after a recoil event.
All media saved in internal 64GB memory.
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15. Measure Distance
Certain models in the MEGA Series are equipped with an integrated LRF
module for measuring the distance to a target. When measuring distance,
hold the device steady and avoid shaking to ensure accuracy.
This feature provides two distance measurement modes: Continuous and
Single. Operation varies depending on the selected mode. You can switch
modes via Main Menu > Advanced Settings > LRF.
Warning: Laser radiation emitted by this device can cause eye injuries, skin
burns, or ignite flammable materials. Ensure no person or flammable
material is positioned in front of the laser lens before activating the laser
ranging function.
The device’s battery is below 5%, LRF will be automatically disabled.
Continuous: Short press the Palettes button to start measuring. The
device will perform continuous measurements for a preset duration
and then stop automatically. to stop earlier short press the Palettes
button again.
Single: Short press the Palettes button to perform a single distance
measurement each time.
Position：Top / Mid
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Unit：Meter / Yard
Mode：Continuous / Single
Duration：15, 30, 45, 60 sec
16. Ballistic Calculation
Before using this function, please note the following two points:
1. Ensure the rangefinding function is working properly. For detailed
instructions on using the rangefinder, refer to the previous section.
2. Ballistic parameters must be set in the ZEN LINK App. The specific steps
are as follows:
Connect the MEGA Series device in the ZEN LINK App. Once
connected, tap the Ballistic Calculation icon.
15
On this page, select the corresponding Ballistic Profile, enter the
parameters, and tap Save after completing the setup.
After saving, the data will be automatically transmitted to and
stored in the MEGA Series device. To modify the parameters in the
Ballistic Profile, reconnect to the ZEN LINK App and repeat the
above steps.
Open the device’s main menu to view or switch Ballistic Profiles in
the Ballistic Calculation menu.
Once the above setup is complete, the Ballistic Calculation function is
ready for use. Follow the steps below:
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Aim at a distant target. The function will not work at close range.
Short press the Palettes button to start rangefinding. After a short
moment, the screen will display the calculated ballistic data.
Adjust the muzzle elevation according to the displayed data to
accurately hit the target.
Adjust the muzzle elevation according to the displayed data to hit
the target accurately. For example, if the screen shows "3 MIL", use
the reticle on the day scope as a reference and raise the muzzle by
3 MIL.
Short press the Palettes button again to turn off the rangefinding
and ballistic calculation functions.
17. Quick Menu
Press Menu briefly to enter:
● Palettes.
● Scene Mode.
● Screen Brightness (1–15).
● Contrast (1–5).
Use Palettes/Capture to navigate, Menu to modify, long press Menu to
save and exit.
18. Main Menu
The Main Menu provides full control of all advanced settings. Access it by
long pressing the Menu button on the home screen. Navigate with the
Palettes/Capture buttons, short press the Menu button to edit or enter a
submenu, and long press the Menu button to save and return to the
previous level.
Operation Mode
Switch between four display styles:
Clipon / Monocular / Scope / Helmet
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● Clipon: Install in front of optic, maintaining zero while extending
detection and engagement capability.
Eyepiece Focus & Parallax Adjustment:
1. Mount the device securely in front of the day scope.
2. Look through the day scope and focus on the thermal display
interface.
3. Rotate the rear eyepiece adjustment ring until the display
appears sharp and in focus.
4. Once properly adjusted, the image and reticle are aligned on
the same focal plane, eliminating parallax so that minor eye
position changes will not affect reticle alignment.
● Monocular: Switch to handheld mode to use the MEGA Series
device as a portable thermal imager.
● Scope: Accurate thermal aiming for close to mid-
range engagements.
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● Helmet: Support mobility, navigation, and close-
range engagements
Wi-Fi
This option enables or disables Wi-Fi, allowing the device to connect to
mobile apps (e.g., ZEN LINK) for remote control, image preview, and
firmware updates. When enabled, the device will broadcast its SSID for
connection.
Toggle wireless connection for app control and file transfers.
● On / Off.
NOTE: Displays SSID on activation. Please check the Wi-Fi name (SSID)
in Advanced Settings > Wi-Fi. The default password is 12345678. If
forgotten, go to Advanced Settings > Wi-Fi > Reset PIN to reset the
password.
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Bluetooth
Bluetooth allows pairing with external accessories such as laser
rangefinders or remote controls. Once paired, the device will recognize
and show the connection status.
Pair with compatible external devices (e.g. rangefinder).
● On / Off.
Palettes
Thermal palettes control how the device translates heat differences into
visual colors. Users can switch between various false-color schemes for
better target visibility under different environmental conditions.
Change thermal display color schemes.
● White Hot / Black Hot / Red Mono / Rainbow / Arctic / Iron Red /
Green White / Tint / Sepia / Fulgurite / Cold Green / White
Highlight.
Display Settings
Adjust screen brightness, menu scale, status bar visibility, and location to
ensure optimal display readability across lighting environments.
Personalize display preferences.
● Brightness (1–15).
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● Menu Size: Normal / Small.
● Status Bar: Auto hide / Always On.
● Countdown Location: Top / Mid.
Scene Mode
There are three scene modes that can be switched via the Quick menu.
Users can customize the Display Settings for each mode, such as weather,
denoise, and contrast, enabling fast and effective transitions between
different environments for optimal viewing.
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● Three Scene Modes: Normal / Highlight / Enhance.
● Editable parameters: Weather, De-noise, Contrast, Sharpness,
Brightness.
● Favorite: The selected scene mode can be switched via the Quick
menu.
● Auto Highlight: On / Off.
When this feature is enabled, the device automatically switches to
Highlight mode after shooting, making it easier to detect and locate
targets while eliminating the hassle of manually switching scene
modes.
Profile
Quickly switch between different zeroing profiles. Once the device is
connected to the ZEN LINK App, rename profiles within the app to make
selection easier.
● Profiles G1–G10 can be renamed in the app for easier identification.
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Media
Browse and view stored photos and videos.
● Thumbnail grid, with album categorized by month.
NUC Shutter
Control thermal sensor calibration.
When switched to Auto mode, the status bar displays an icon with the
letter A; in Manual mode, it shows M; in External mode, it shows E.
● Auto / Manual / External.
● Auto: The device automatically triggers image calibration at regular
intervals without user action.
● Manual: User initiates calibration manually by long pressing the
Zoom button.
● External: Close the lens cap and long press the Zoom button to
calibrate.
MIC
Enable or disable ambient audio recording.
● On / Off.
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● Gain: -5~5.
Adjust microphone gain level
Menu Sorting
Reorder items in Main Menu.
● Press the Menu button to switch menu items, and use the
Up/Down buttons to move positions.
Compass Calibration
Guide to recalibrate electronic compass.
● Requires manual motion in specific directions until green icon
appears.
Prerecord
Automatically captures video before and after recoil.
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● Sensitivity: Low / Medium / High.
Adjust the sensitivity of this feature.
● Duration: 10s/15s/20s/25s/30s (before & after).
Set the time to start recording the video. For example, if set to 15
seconds (before shot), the video will start recording 15 seconds
before the shot.
Auto Sleep
When the device's pitch angle exceeds 65 degrees or the roll angle exceeds
45 degrees, it will enter standby mode after the preset period of inactivity.
● Delay: 3 / 5 / 10 min.
Pixel Correction
Fix defective (hot/stuck) pixels manually.
● Press and hold the menu button to enter the main menu.
● Select the Pixel Correction function to enter the Pixel Correction
screen and the coordinate position of the reticle (X axis, Y axis) will
be displayed in the center of the screen.
● Find the bad pixels in the screen.
● Press the menu button to toggle the x and y axes and press the up
and down buttons to adjust the position of the x and y axes. Press
the menu button to calibrate the bad pixels.
● Repeat the above operations to continue selecting bad pixels.
● When the calibration is done, press and hold the menu button to
exit the pixel correction.
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Time/Date
Manually set time and date.
● Year, month, day, hour, minute, and second can be set individually.
● Used to display time in the status bar.
● Required for accurate file naming.
Language
Choose device interface language.
● English / Deutsch / Italiano / Čeština / Magyar / Español / Français
Reset Settings
Restore factory defaults (non-destructive).
● Confirmation required.
Erase Media
Delete all saved photos and videos from internal storage.
● Confirmation required.
About
View firmware version, serial number, and hardware ID.
19. Connecting to ZENLINK App
App Installation:
iOS
Android
● Download ZENLINK from App Store (iOS) or Google Play (Android).
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Connecting:
1. Turn on device Wi-Fi (Main Menu > Wi-Fi > On).
2. Note SSID displayed in Main Menu > Advanced Settings > Wi-Fi.
3. On your phone, go to WLAN settings and connect to the same SSID.
Default password: 12345678
4. Open ZEN LINK App → Tap connected device → View real-time
image or access media.
20. Firmware Upgrade
1. Connect mobile device to the unit via Wi-Fi.
2. Open ZENLINK App → Tap Settings ⚙.
3. Select Firmware update → Tap Download Now.
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4. Follow prompts to complete installation.
5. Device will automatically restart and apply updates.
Important: Do not disconnect during upgrade. Ensure battery >50% or
connect external power.
21. File Transfer to PC
When connected via USB-C cable:
1. Power on the device.
2. Connect to a PC via cable.
3. Device will appear as a USB drive. Double-click to open and view
files.
4. Open folders by date to view:
The device stores captured photos and videos in its USB
drive.
Users can copy them to their computer.
Photos (.jpg).
Videos (.mp4).
The naming conventions for photos and videos are:
● zentron_image_YYYY_MM_DD_HH_mm_ss.jpg.
● zentron_video_YYYY_MM_DD_HH_mm_ss_auto.mp4.
● zentron_video_YYYY_MM_DD_HH_mm_ss_manual.mp4.
● auto.mp4 is the video automatically recorded by the Prerecord
function.
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● manual.mp4 is the manually recorded video.
● YYYY_MM_DD_HH_mm_ss represents year, month, day, hour,
minute, and second.
22. Maintenance & Cleaning
● Lens: Use provided microfiber cloth. Do not use alcohol or coarse
material.
● Body: Wipe with soft damp cloth. Avoid solvents.
● Storage: Keep dry, store in provided bag.
● Charging Port: Avoid dust buildup.
● Battery: Charge every 3 months during long-term storage. Avoid
full depletion.
23. Troubleshooting (FAQ)
Issue
Possible Cause / Solution
Device won’t turn on
Check battery orientation / charge level
Wi-Fi not visible
Ensure Wi-Fi is enabled in main menu
App fails to connect
Forget Wi-Fi, reconnect / Restart device
Image is blurry
Adjust lens focus / Eyepiece diopter
Reticle is misaligned
Perform zeroing again / Reset profile
Video not recording
Ensure sufficient storage space
Battery drains fast
Enable Auto Sleep, disable Wi-Fi and Bluetooth
24. Legal & Compliance
FCC ID: 2BVLG-MEGA-CQ25R
FCC Statement:
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference
29
to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Caution: Any changes or modifications to this device not explicitly
approved by manufacturer could void your authority to operate this
equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
RF Exposure Information
The device has been evaluated to meet general RF exposure requirement.
The device can be used in portable exposure condition, compliance with
exposure requirements.
This equipment should be installed and operated with minimum distance 0
mm between the radiator & your body.
25. Caution
Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.
1. Laser safety levels are classified according to IEC 60825-1: 2014.
2. The laser module information is as follows :
Wavelength: 905nm
Maximum single pulse energy: 0
Laser safety level
：
Class 1
Pulse width：0
Repetition frequency
：
1-5hz
Note：Semiconductor laser, without Maximum single pulse energy and Pulse width
parameters.
30
26. Contact & Support
For technical support, warranty service, or general inquiries:
● Website: zentronoutdoor.com
● Email: info@zentronoutdoor.com
Users can also submit feedback and contact our agents through our
ZENLINK app.
Step 1:
Connect device to the ZENLINK app, then navigate to the "About" page. Fin
d the submenu "Feedback" under Support.
Step 2:
Tap on "Feedback" to report any issues encountered or to share valuable
experience using our products. Our team is here to help and will respond
promptly.
At Zentron, we value your experience. You’re welcome to share any
feedback regarding product usage, technical issues, or suggestions for
improvement. Our professional technical support team is committed to
responding within 24 hours.
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