Specifications : Standard : bluetooth v2.0 compliant ; Profile Supported: Headset &Handsfree,A2DP&AVRCP ; Frequency: 2.4 GHz ～ 2.483GHz ISM Band ; Output Power: -6 ～ 4dBm ; Transmit Mode: GFSK ; Range: 10 meters ; Charging: USB 5V ; Charging time: around 2.5 Hours ; Talk time: 5 hours ; Stand by time: up to 150 hours ; Weight:15g ; Microphone type: 4mm omni-directional ; Pairing passkey or PIN: 0000 ; Dimensions: 42mm*29.2mm*13.8mm ; Package size ： 102mm*52mm*45.0mm . Functions : Answering or ending a call ; Voice dialing ,redial last number ; Rejecting a call ; Listening to   music ; Can be auto connected after the mobile power off .