Active Noise Canceling Wireless Headphone

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