One button open and connect to use, automatic pairing connection (no blue tooths and other tedious operations to use it) For Live broadcast, short video, interview, video sound enhancement. 20 meters barrier-free reception of this K9 lavalier wireless microphone.
[Frequency range] 2.4GHz
[Frequency response range] 20-30khz [Transmission delay] 9Ms
[SNR] 64dB
[Input voltage] DC4.8~ 5.4V
[Charging current] about 65mA
[Battery capacity] 80mAH
[Working time] about 8H
[Charging time] about 80min