Alarm and audio surveillance transmitter. On activation, it transmits microphone audio NBFM in 40 MHz band. Together with the audio, there is a single morse code letter identification transmitted, too. By the front panel switch, the ID can be chosen from about 6 pre-pogrammed single letters. The output power is about 5 W with very strong output signal filtration. Powered by 12 V, takes about 1,5 A.