Frequency range: 2.4GHz
Charging voltage: DC4.8~5.4v
Transmission distance: 20 meters without barriers
Human obstacle distance: about 7 meters
Microphone: digital microphone
Working hours: 10H
Signal to noise ratio: 64 dBm
Start-up current: 1.5~6mA
Charging interface: ANDROIT
Transmission delay: 9MS
Standby current 4.3~5.5mA
Sensitivity (microphone): -26dB
Battery capacity: button battery 80mAH
Antenna type: ceramic antenna
Charging current: 65mA
Frequency response range: 20-20KHZ