Plantronics 202649-01 Backbeat Sense Stereo Bluetooth Wireless Headphones - Black/Espresso Backbeat Sense/R Headset, Black Bluetooth v4.0 + EDR, A2DP, AVRCP, HFP 1.6 wideband, HSP 1.2 Up to 18 hours wireless streaming, 21 days standby time, 180 days in DeepSleep mode Rechargeable, non-replaceable lithium-ion, Up to 2.5 hours Up to 100 meters/330 feet from phone or tablet with Class 1 Bluetooth