1)Power supply: 2~5VDC
2) Carrier frequency:

     Europe 863.3/863.9/864.5MHZ

     America 914/914.5/915MHZ

     Global 2402/2403/2404MHZ

3) Modulation: Mono /±75kHZ
4) Operation distance: >100Meters

5) Distortion: 1% 
6) Frequency response: 20H－16KHZ
7) S/N ratio: ≥75dB 
8) Audio input range: 0－1V (RMS)
9)Measurement: Receive 50*35m

 Transmit 33.5*35mm