Headset Size ： 45.0mm*26.0*12.0mm ; 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 ; FM mixer range: 87.5MHZ ～ 108 MHZ ; 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 many leds direction. 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; FM reception of radio .