bluetooth version:Nuoda3.0
Power frequency:US$4.0002MHz~US$4.0080MHz ISM Band
Transmission power:≤20mAh
Audio processing technology
Transmission distance:10m
battery capacity:120mAh，Built-in polymer battery
talk time:≤8h
Standby time:≤120h
Charging time:≤2h
Speaker resistance:16Ω + 15%
Microphone sensitivity:-42dB（0dB=1V/Pa,1KHz)
Speaker frequency:20HZ—20KHZ
Horn diameter：10mm
Speacker Transmission power：3mW*2
SNR：≥80dB
speaker sound pressure level：113dB/+-3dB(1kH/1Vrms)
degree of distortion：≤1.0%