SHARKK&reg; Bluetooth 4.0 Headphones Wireless Headset For iPhone 5S / 5C / 5 / 4S / 4, iPad / Galaxy and all Android Bluetooth Device / With Built in Mic For Phone Calls (Bluetooth 4.0, Black) Unique around-the-neck design that's lightweight and comfortable for all-day use Magnetic ear buds snap into place when not in use; music controls on neck strap Newsest version of Bluetooth Version CSR 4.0 for best quality connection and experience Charges in 2 hours and battery lasts up to 13 hours. Built in rechargeable battery