Features: 1.It is designed with Magnetic adsorption,cool to wear on neck 2.High-end metal design 3.Made by special material, sweatproof design. Ergonomic innovative design ensures this headset is comfortable and secure for sports 4.Built-in battery for long time playing music. 5.HiFi Stereo sound quality, enjoy high quality music. 6.Newest Bluetooth version 4.1, operation distance up to 10 meters 7.With Microphone function, handsfree to answer calls. 8.IOS mobile phone battery display. Specifications: Bluetooth Version:V4.2 Talk time:4-5 hour Music time:3-4 hour Standby: 150hour Charging time:1-2 hour Charging voltage: DC5V/1A Transmission distance:10m Channel:Stereo Color:Black,gold,sliver Package: 1x Wireless Sport Earphone 1x Charging Cable