made in china
mode:BES777
name：BES777
type：End-user portable product
spc：Bluetooth 1.2
profile：Hand-Free,Headset
power ：Class 2
format：HV1/HV2/HV3,USA/EU(79 channel),Bluetooth Headset profile   or Audio Gateway roel
reveived delicacy：<_80dBm@0.1%BER
output power：-6~+4dBM
frequency range：2400-2483.5MHz
work time：4-6hrs
standby time：190hrs
size：61.75mm*24.85mm*14.5mm
weight： 16.9g