Bluetooth Version: V4.0
Bluetooth range: 10 m (free space)
Transmission frequency: 2.402 GHz-2.48 GHz
Bluetooth profiles: HSP / HFP / A2DP / AVRCP
Headband Material: metal
Driver units: 40mm
Noise reduction value: 18dB-20dB
Mic Size: 4.0 * 1.5mm for hands give call
Cushion set Size: protein material, 9.5 cm (L) * 8 cm (W)
Wear case: cloth material
Aux cable length: 1.5 m
Battery capacity: built-in 400 mAh lithium battery
Charging voltage: micro usb 5 V / 1A
Full charging time: about 2 hours
Working time: over 20 hours, if ANC away from / over 18 hours, if ANC on
