Product features<br />Wear comfortable<br />Version 4.1 compatible with all mobile phones<br />A2DP・ which supports music playback<br />Multipoint Connection・ which connects two phones simultaneously<br />Siri Control・ intelligent voice Control<br />Voice prompt<br /><br />Technical parameters<br />Version: V4.1 compatible with V3.0・ V2.1・ V1.1<br />Transmission power: Class2<br />Transmission frequency: 2.4 GHz<br />Transmission distance: over 10 meters<br />Call time: 4 ~ 6 hours<br />Standby time: 100 ~ 150 hours<br />Support file format: A2DP・ AVRCP・ HSP・ and HFP