The Xtreme Bluetooth Wireless Audio Receiver with built-in microphone makes talking to family and friends or listening to music a breeze. The receiver streams audio to any non-Bluetooth enabled device with a 3.5mm audio port and the built-in mic is perfect for a convenient and enjoyable hands-free calling experience. Receiver is suitable for any car, home stereos, headphones, or earbuds and has a rechargeable Li-ion battery (charging cable included).