ven-dens Bluetooth Handsfree Wireless Business Earphones VD-BT004

Model : VD-BT004
Bluetooth spec : V4.1+edr
Transmission frequency : 4.2GHz
Support mode : A2dp1.2/avrcp1.0/hsp/hfp1.5
Transmission power : Class 2
Working distance : 10m
Battery capacity : 50Mah li-ion battery
Talking time : Rough 4 hours
Standby time : Tough 120 hours
Charging time : Rough 1.5 hours (Micro 5pin)