Aluratek ABH13F Bluetooth Wireless Sport Earbuds Delivers hands-free convenience and superb high-fidelity stereo sound Designed for comfort Contoured to ear, lightweight, sweat proof Built-in lithium ion rechargeable battery provides up to 4 hours of talk and listening In-line controls on cord to play, pause, next track, previous track, answer and reject calls Connectivity technology : Bluetooth 3.0