Features:- Mini design invisible wireless in-ear.- Super Mini Size and hidden in the ear, no charge of use.- Ergonomic earphone design, stable in ear, good for driving, sports, business or leisure.- Wireless signal V4.1 + EDR with range of 10 meters.- Deep DPS noise reduction microphone ensures clear call quality.- Voice prompt for pairing, calling, on/off.- One function button for on/off, music switch, language change, receive call.1. turn on the headset. He stays in standby mode.2. Look for blue tooth devices on phones.3. according to the phone prompt, pair the headset and phone. If pairing fails, repeat it.4. If pairing is successful, the indicator will flash blue. You can dial in standby mode or in ready state.Specifications:Model No: S650Version: V5.0Distance: about 10MWorking time: about 4-5 hoursCharging time: about 1-2 hoursStandby time: about 150 hoursCompatible Phone: Compatible with Android, iOS, Microsoft, Tablet, 99% phoneIncluded in the Package:1x S650 Headphone1x USB Charger Cable1x Using Manual