
SET UP GUIDE
MODEL: 308-1409WTv4
Wireless Thermometer

1. Insert 2-AA batteries into your Outdoor Sensor.
2. Insert 2-AAA batteries Into your Thermometer.
3. Enter the Settings Menu to adjust your time.
4. Once the sensor is reading to your thermometer, place the sensor
outside in a shaded location.
View our sensor mounting video here: bit.ly/th_sensor_mounting
2
POWER UP
Thermometer
308-1409WTv4
Outdoor Sensor
TX141-Bv4
AA
AA
AAA
AAA
FAHRENHEIT OR CELSIUS
· Press +/°F/°C to select Fahrenheit or Celsius Temperature Display

3
1. Hold the SET/HI/LO button until the display changes to enter the
Settings Menu. Press and release the +/°F/°C button to adjust values.
Hold to adjust quickly.
2. Press and release the SET/HI/LO button to confirm values and move to
the next setting or exit the menu.
SETTINGS MENU
HI/LO TEMPERATURE RECORDS
Press the SET/HI/LO button to view the HI then the LO
Temperature Records.
Reset HI /LO Records:
1. Press the SET/HI/LO button to view records
2. When viewing HI/LO records, hold the
SET/HI/LO button for five seconds to reset all records
at one time.
3. HI/LO readings will reset to current temperature.
Note: The records will automatically reset daily at 12:00AM.
LO Records
HI Records
TEMPERATURE TREND ARROWS
The arrows next to the temperature readings indicate if the
temperature is rising, falling, or remaining steady.
Temperature has risen (2°F / 1°C)
Temperature has not changed
Temperature has fallen (2°F / 1°C)

4
SEARCH FOR OUTDOOR SENSOR
• If the sensor loses connection to the thermometer for any reason, the hermometer
will show dashes after 30 minutes.
• The thermometer will automatically search for 3 minutes every hour to try and
reestablish the sensor connection.
• To manually search for your Outdoor Sensor, hold the +/°F/°C button until the
Reception Icon begins to flash.
• When the sensor is connected, the Reception Icon will be solid.
• If your thermometer is unable to reconnect on its own, a Restart may be necessary.
RESTART
1. Bring your sensor inside next to the thermometer and remove batteries from
both devices.
2. Press any button at least 20 times, and then wait 15 minutes.
3. After the wait, install fresh batteries into both your sensor and thermometer. Your
outdoor temperature should return within the next few minutes.
4. Keep your sensor next to the thermometer for another 15 minutes to
establish a strong connection.
5. Once connection is reestablished, place it back outside in a shaded location.
Note: Pressing the TX button inside the sensor’s battery compartment will help
force a transmission.
LOW BATTERY INDICATOR
Low Battery Icon by Outdoor Temperature, replace batteries in the Outdoor
Sensor.
Low Battery Icon by the Indoor Temperature, replace batteries in the
Thermometer.

5
SENSOR WEATHER SHIELD-NOT INCLUDED
• The Sensor Weather Shield is designed to protect your outdoor sensor
from rain and snow. Optional.
• This shield will oer limited protection from the sun’s heat.
• Optional Purchase at: bit.ly/925-1418
SPECIFICATIONS
308-1409WTv4:
Temperature Range: 32°F to 122°F (0°C to 50°C)
Humidity Range: 10% to 99% RH
Power Requirements: 2 “AAA” LR3 Batteries
(not included)
Battery Life: 24+ months with reputable batteries
Dimensions: 2.63 In L x 1.35 in W x 3.67 in H
(6.69 cm L x 3.44 cm W x 9.34 cm H)
TX141-Bv4
Temperature Range: -40°F to 140°F (-40°C to 60°C)
Transmission Range: over 330 feet (100 meters)
in open air RF 433MHz
Power Requirements: 2 “AA” LR6 Batteries
(not included)
Battery Life: 24+ months with reputable batteries
Dimensions: 1.58 in L x 0.83 in W x 5.08 in H
(3.99 cm L x 2.1 cm W x 12.99 cm H)

6
CARE AND MAINTENANCE
When batteries of dierent brand or type are used
together, or new and old batteries are used together,
some batteries may be over-discharged due to a
dierence of voltage or capacity. This can result
in venting, leakage, and rupture and may cause
personal injury.
• Do not mix Alkaline, Lithium, standard, or
rechargeable batteries.
• Always purchase the correct size and grade of
battery most suitable for the intended use.
• Always replace the whole set of batteries at one
time, taking care not to mix old and new ones, or
batteries of dierent types.
• Clean the battery contacts and also those of the
device prior to battery installation.
• Ensure the batteries are installed correctly with
regard to polarity (+ and -).
• Remove batteries from product during periods of
non-use. Battery leakage can cause corrosion and
damage to this product.
• Remove used batteries promptly.
• For recycling and disposal of batteries, and
to protect the environment, please check the
internet or your local phone directory for local
recycling centers and/or follow local government
regulations.
Ask questions, watch set up videos, and
provide feedback on our social media outlets.
Follow La Crosse Technology on Youtube,
Facebook, Instagram, & X (Twitter).
STAY IN TOUCH!
WE’RE HERE TO HELP
If you require additional support, call our
friendly customer support team based out of
La Crosse, Wisconsin.
Self Help: bit.ly/308-1409wtv4_support
Phone: 1.608.782.1610
Online: bit.ly/contact_techsupport
Our knowledgeable customer support team is
available: Monday-Friday, 8am-6pm CST.
WARNING: This product can expose you to
chemicals including acrylonitrile, 1, 3-butadiene,
and styrene, which are known to the State of
California to cause cancer and birth defects or
other reproductive harm. For more information go
to:
www.P65Warnings.gov
Scan for
Support

7
WARRANTY
La Crosse Technology, Ltd. provides a 1-year limited time warranty (from date of purchase) on this product
relating to manufacturing defects in materials & workmanship.
La Crosse Technology, Ltd, 2830 S. 26th St., La Crosse, WI 54601
For Full Warranty Details, Visit: www.lacrossetechnology.com/support
Patents: www.lacrossetechnology.com/patents
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 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.
•
Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
•
Increase separation between equipment & receiver.
•
Consult the dealer or an experienced radio/TV technician for help.
This device must not be co-located or operating in conjunction with any other antenna or transmitter.
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.
CAUTION!
The manufacturer is not responsible for any radio or TV interference caused by unauthorized changes or
modifications to this equipment. Such changes or modifications could void the user authority to operate the
equipment.
All rights reserved. This manual may not be reproduced in any form, even in part, or duplicated or
processed using electronic, mechanical or chemical process without the written permission
of the publisher. This booklet may contain errors or misprints. The information it contains is regularly
checked and corrections are included in subsequent editions. We disclaim any responsibility for any
technical error or printing error, or their consequences. All trademarks and patents are recognized.
Designed in La Crosse, Wisconsin • Made in China • Printed in China • DC 020524

