... :2.4GHZ ISM BAND PC system:Win2000,win xp,win7,vista,10M Power:3.7V 380mAH Wireless Bluetooth Headphone Stylish, comfortable and ... engineered with cutting-edge Bluetooth wireless technology, this Bluetooth device helps to provide wireless access to music and voice calls while on ... Supply: Built in Rechargeable Li-ion Battery Color: Black , Red Wireless Bluetooth Headphone