Bluetooth Headphones with Mic, Stereo Wireless Headphones 40 MM Drive, 8 Hrs Playtime Foldable Headset, Support TF Card, FM Radio Wired&Wireless Mode for PC Cellphone TV - Blue

Specifications: Supporting: ACRCP1.3/A2DP1.0/Hfp1.5/HSP1.0 Working Range: up to 8-10m Frequency Response: 2.402-2.480GHz Battery Voltage: 3.7v / 400mAH(Built in rechargeable lithium battery) Battery Charging Voltage: DC4.2-5.5V Charging Time: about 2H Working Time: about 8H Standby Time: about 30H Sensitivity: 102±3db/mW Impedance: 32ohm Speaker diameter: 40mm Color: Black Package List: 1* Bluetooth headphone 1*1.2m wired cable(3.5mm) 1* USB charge cable 1* Manual Note: 1.Please turn off the device to avoid power consume if no pairing behavior taken after bluetooth headphone entering to pairing system . 2.Please do not perform other operations when searching bluetooth in case of procedure error. 3.Please adjust volume properly to avoid doing harm to ears. 4.Please pay attention to choose a good surroundings for bluetooth headphone use to avoid causing damage to headphone. 5.Please get bluetoooth headphone full charged firstly when using if not being used for a long time before.