Wireless Bluetooth Headphones, Otium Wireless Sports Earbuds Sweatproof Portable Stereo Mini Earpiece Lightweight Headsets With Microphone - Black Bluetooth Profiles: CSR 4.0, Headset & Handsfree and A2DP/HFP/HSP/AVRCP Sweat-proof, durable design, onscreen battery meter, up to 5 hours of talk/playing time and 180 hours standby time Eliminates the white noise and delivers a clean audio experience offering hours of pure enjoyment Universal Device Compatibility --- Otium headphones are compatible with most bluetooth-enabled devices & apps. An innovative one-to-two technology allowing the headphones to connect two devices at the same time. Simple-to-use --- Control all functions of music (volume, sound, song selection) and calls the last dial number from phone on the headphones directly.