Ergonomics Design: Earbud is designed according to ergonomics and it is smallest bluetooth Earbud in currently, Fits either ear, wear the bud on right ear for better call clarity.Bluetooth issc V4.0 Version:Supports Multipoint Technology Can connect to two different devices in 10 meters range simultaneously. which makes it fit perfectly to your ear and comfortable. Guaranteed to be 100% secure & stable during intense exercise such as running, climbing, riding, camping and other active sports even in a rainy day.Longest Service Time: Built-in high performance rechargeable Lithium-poly 60mAh battery,High capacity battery provides up to 6 hours call time and 4-6hr music playtime at 40-50% volume (adequate for home/office with little noise interference),full charge in around 1-2 hours and up to 130 hours standby time.Perfect compatible : Clear HD audio for listening to Audiobooks, Podcasts and Netflix, decent for music and calls.Compatible with most Bluetooth enabled devices such as iPhone ,iPad,Samsung,iPod, Laptop&tablets and another Smartphones LG/SONY/HTC etc.Support Stream Music/Video/Audio. Its hands-free function would release your hands from answering the call during driving or walking