Specification: 
Bluetooth version: low power core V5.0+EDR
Bluetooth protocol: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5
Rated voltage: 3.7V
Frequency (Rated frequency): 2.4G
Rated power: 7mW
Current (Rated current): 350ma
Load description: 32Ω
Headphone battery: single side 65mAH, plus protection board polymer battery
Charging box battery: 500mAH,   polymer battery
Charging power: Headphone 5V/1mA, charging box 5V/1mA
Transmission distance: 15 meters
Frequency: 2.4GHz-2.48GHz
Listening to the song time: about 6 hours
Talk time: about 6.5 hours                    

 Feature:
Standby time: about 1800h
Charging time (headphones): Approx. 1.1 hours
Charging time (charging box): About 1.5 hours
Charging times (charging box): 4 times
Single earphone charging time (USB charging slot): Approx. 1.5 hours
Charging box size: 7.3*6.3*3.6cm
Single earphone weight: 7g
Charging box weight: 44g
Package Weight 150g
Package box size 110*75*40mm
PCS/CTN: 50pcs/CTN
Carton size: 41*22*39cm
Carton Weight:8KG