Wireless Microphone Model AP-M600BB

Distance from 50 to 70 meters
The same frequency, distance from 5 meters to 10 meters
100 sets can work together
Receiving sensitivity:-94Db
Maximum Radio Frequency Input Signal Amplitude: 10dBm
Audio output drive resistor: 600!)
Audio Frequency Response Range: 20KHZ
SNR: 96dB
Total hannonic distortion: 0.01%
Delay of transmitting and receiving: 3Ms
Power supply: DC12V

Transmitter Technical Specifications:

Bodypack transmitter 

Frequency range: 640-669MHz 30 frequency point is optional
IR button selects the channel, and the wireless data automaticall
Connects the upper frequency with the LED display
Channel spacing :l00KHZ
Output power: l 3dBm
Transmitting bandwidth: 300KHZ
Power ratio:60 dBc
Mic input sensitivity :8mV
Maximum input single end of microphone <THD: 1%: 2 Vpp
Audio Frequency Response Range: 30HZ-20KHZ
Audio dynamic range: 96dB
THD: 0.01%
Delay of transmitting and receiving: 3Ms
Power supply: DC3V