Bluetooth headphone with mic

Bluetooth Version : 2.1+EDR

Operation Range : Up to 10 meters

Battery version : 300m Ah lithium rechargeable battery

Working time : Music time up to 12 hours and talking time up to 20 hours

Battery charge time ：2 +/-0.5 hours

LED Indication :Charging -Red ,Working Blue

Audio Input :Bluetooth and normal 3.5mm audio cable in 1.5m for a wired headphone

High quality mic. for comfortable conversations

Leather soft ear-cushion

Standby time ：270 hours

Charging socket  : Micro 5pin USB

Speak Diameter : 40mm

Frequency Response : 20-20KHz

Impedance : 32 Ohm +/-15%

Sensitivity : 105dB +/- 3dB

Mic. : -58dB

Distortion rate ：0.10%

Battery Capacity :