Specification&nbsp;Bluetooth Version : v 5.0 + EDR&nbsp;bluetooth Profiles : HFP , HSP , A2DP , AVRCPCHIP: CSR&nbsp;BATTERY : 100 mAH&nbsp;Working Time : 7 hoursCharging time :&nbsp; 1-2 hoursStandby Time : above 200 hours&nbsp;Operation Range : 10 meters&nbsp;Features:Stereo Sound Music&nbsp;CVC noise reduction technology&nbsp;Clip-on&nbsp; style and retractable type&nbsp;Vibration prompt&nbsp;IOS Battery capacity display&nbsp;Call recive function&nbsp;Stereo high definition music&nbsp;Last number reial&nbsp;can connect 2 mobile phones at the same time&nbsp;