COK 

Frequency Range:            174-270Mhz

Frequency Range:            174-270Mhz  

Modulation Method:           FM  

Frequency Response:      40Hz-15KHz

Dynamic Range:               >100dB

Audio Output:                    0-300MV

Receive Distance:             0~30m

Power Supply Mode:        18650 Lithum Battery 

Transmitter Working hours:  6~10 hours

Receiver Working hours: 3~8 hours