Built-in Battery: With high performance rechargeable polymer battery, this headphone provides 8-10 hours of music time, less than 3 hours of charging time Durable Earphone With mic and Call Receive / Cut and Play / Pause Button (Change Track on Double and Triple Click) makes it easier to have long lasting and frustration free music and call experience. These sweat resistant earphones are great for running and gym workouts. Universally Compatibility: Suitable for Bluetooth-enabled devices Multi functional Design: Support wireless connection via Bluetooth, & wired connection with phones/computer; Support SD card
