Bluetooth version: V2.1+EDR
Charging voltage: DC5V/500mA
Working voltage: DC3.7v
music playing time: 4H
Talking time: 8H
Signal to Noise Ratio:≥65db
Bluetooth working frequency:2.4GHz
Bluetooth range: 10-20m
battery capacity: 400mah
Packaging:color box/customized
