Built-in rechargeable Li-ion battery supports up to 10 hours of playtime. Tangle-free cord round cable which is durable and won’t tangle up in knots. Easily control your sound and manage calls from your earphone with convenient three-button inline remote with microphone. Explosive bass in earphone calling control & music. Incredibly detailed high definition audio. While running, jogging & gyming you can control toggle the volume/skip tracks/smartphone assistance Built-in attractive ergonomics design with extra comfort. Fast pairing with all smartphones having Bluetooth functionality. Submerge yourself in the limitless world of sound with the latest in Bluetooth innovation. A perfect listening experience by cutting edge technology is efficient & convenient.