Microphone Size: 65*18.5*26mm
Port size: 44.5*27.5*7.8mm
Frequency range:2.4GHz
Input voltage: DC4.8~5.4v
Working distance: >20m without barrier; 7m with human barrier
Frequency:20-20KHZ
Transmitter working current: 11~12mA
Receiving end working current: 20~21mA
Power-on current: 10~11MA
Power-off current: 2~3uA
Signal-to-noise ratio:64 dBm
Transmission delay:30MS
Charging port: Type C
Sensitivity:-42dB
Antenna type: Ceramic Antenna
Battery voltage: 4.1~4.25V
Battery: 70mAh Li-polymer
recharging current: 60mA
Charging time: 90min
Working time: 6h