pecifications:
Bluetooth Version: V3.0+EDR
Frequency: 2.4026GHz-2.480GHz
Transmission distance: 30ft or so
Li-ion Battery:3.7V/120mA
Charging time:2.5 HRS
Standby time:60 Hrs
Continuous working time: about 5Hrs
Package Inlcudes:
1*Bluetooth Headband
1*Charging cable
1*Instruction Maunal