BT Diamond Double Battery

BT Diamond Double Battery
1.voice change
2.400Mah battery
3.magnetic on/off
4.anti-lose
5.Bluetoothversion:BluetoothV5.3
6.Speakerspecification:10mm220
7.Frequencyresponse:20-20KHz 4.Output power:20mW
8.Transmissiondistance(barrier-
free):10m
9.Signal-to-noiseratio:95dB
10.Distortiondegree:1%
11.Batteryspecification:3.7V/200mAh
without protective plate
12.Chargingtime:1-1.5hours
13.Playtime:about 60hours
14.Standbytime:about: 300hours
15.Mi-headsensitivity:-42dB ±3dB