Audio-Technica ATH-SPORT4BK SonicSport Bluetooth Wireless in-Ear Headphones Bluetooth wireless technology with in-line mic and controls for answering/ending calls, controlling music & video playback and controlling volume wirelessly on Bluetooth wireless devices Pairs with up to eight Bluetooth wireless devices, Performance-enhanced 10 mm drivers Lab tested and certified IPX5 waterproof rating allows headphones to be washed after use Flexible memory cable for custom, secure fit NOTE: Compatible Bluetooth Profiles: A2DP, AVRCP, HFP, HSP. Refer the Application guide available under technical specification