Robiear Bluetooth Ear Hook Wireless Sports Jogging Stereo Waterproof Headset Earphone The use of distance: 10m. The latest Bluetooth 4.1 technology. Talk time: 4.5 hours. Charge hours: 2 hours. Standby time: 180 hours. Call dialing, remote answer / end / reject / switch, telephone redial, mute, volume control. English switch, smart one for two, music pause / play, up and down the song. Supports any, IPAD tablet, desktop computer with a Bluetooth device class phones.