Zebronics Zeb-Faith Portable Bluetooth Headset Headphone with Mic - Black Features: BT wireless technology FM radio Supports micro SD card Detachable earphone BT module compatible with any 3.5mm device like headphone, speakers etc. Specification: BT version : V 4.2 BT profile support : HSP, HFP, A2DP, AVRCP BT range : ≤10m BT paring name : ZEB-FAITH Drive size : 10mm Impedance : 32 Ohms Frequency response : 20Hz-20KHz Sensitivity : 102 ± 3dB Playback time : 4-6 hours Talk time : 6-8 hours Charging time : 1-2 hours Battery type : Li-polymer Battery capacity : 140mAH Microphone type : Omnidirectional Material type : ABS Dimension : 20 x 12 x 64mm (W x D x H) Net.weight : 25g