Red Fox Wireless EDGE IPX4 Bluetooth Wireless Headphone (Black) Built-in microphone , Controls for music and phone Bluetooth V2.1+EDR with AD2P & ACVRP , 5-7 hours of continuous use - 1 hour re-charge time Li-Ion 3.7V, 150mAH rechargeable battery , Use With: iPod, iPhones, Android, Smartphones, PC, Tablets and Bluetooth TVs USB to mini-USB charger included , Limited One-year Warranty Available in various colors.