SD10 SoundWear Wireless Bluetooth Stereo Headset (Foldable Portable Rechargable Headphones with Built-In Remote Control) from ORZLY Playback Functions: Play/Pause, Next Track, Previous Track, Volume Up and Down. Battery: Built-In Li-Polymer/Rechargeable Talk/Music Time: 20 hours Standby Time: 400 hours Radio Performance: Bluetooth Class II, Up to 5-10 metres.