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952.007UK User Manual
The VM25B is pre-wired with a fixed microphone lead which has a DIN connector at the end. The comms
handset connects to this lead via a corresponding DIN plug. Feed the lead from the VM25B into the
vehicle cabin through a window or bulkhead and connect the handset, ensuring that the DIN connectors
are orientated correctly (each connector has a matching key to ensure correct connection).
For power, the VM25B has a 12Vdc input near
to the hard-wired microphone lead. A DC lead
is provided for powering from a vehicle 12V
outlet and this should also be fed into the
vehicle cabin through a window or bulkhead
and connected to the 12V outlet.
Operation
Once power is connected, press the Power on/off button (4) to activate the VM25B and a red LED will
light on the upper right-hand side of the number pad to show that it is powered on (9). and speak into the
microphone (8). To adjust the volume, press and hold the Vol- or Vol+ buttons (7, 12)
To create a looped message, press the Loop Record button (10) and the LED indicator (9) will light red.
Speak into the microphone and press the Loop Record button again to stop recording.
The loop can be up to 120 seconds in length. To play back the loop, press the Loop Playback button (11)
and the recorded speech will play back continuously. Press the Loop Playback button again to stop the
loop. Again, Vol- and Vol+ can adjust the volume of the playback. To record a new loop, press the Loop
Record button again to over-write message and erase the previous loop.
The top of the handset of the VM25B is fitted with a USB input (3) and SD card slot (2) for connecting
memory devices. Connect a USB memory stick and/or SD card with digital audio files stored on them here
and playback will begin automatically. Track navigation is controlled by the Previous, Next and Play/Pause
buttons (7, 12, 13). Short press the Previous or Next buttons to skip through tracks or long press these
buttons to adjust volume (Vol- or Vol+). Play/Pause can pause the current track and restart it. The button
marked ‘M’ is the Mode selector (6) and selects between USB or SD media, Aux or Bluetooth mode.
Connecting a line input to the stereo 3.5mm aux jack input (1), such as an mp3 player or smart phone will
allow playback from that source. To switch from this to USB or SD card playback, press the Mode button.
The VM25B also has a built-in Bluetooth
®
receiver, which allows wireless playback of tracks stored on a
smart phone. Another application for this is to use one of the many Bluetooth microphone apps available,
enabling the smart phone to become a wireless microphone for the VM25B. If using the Bluetooth in this
way, care must be taken to keep the smart phone from “hearing” its own output and causing feedback.
When Bluetooth is active, the LED indicator (9) will flash green. Open the Bluetooth menu on the smart
phone and search for a device called “Megaphone bltooth”, then select to pair with it.
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