USB Power SupplyCharge it on the USB port and connect it to your audio device via 3.5mm aux audio cable(included) while using, never worry it will run out of power while listening to music.Bluetooth Audio Adapter for Music:This Bluetooth music receiver is the perfect solution for your various non-Bluetooth home audio systems or car speakers to achieve the ideal wireless audio.You could have an excellent listening experience with crystal clear,high fidelity at any place indoor.Portable design: Small and delicate, portable features let you carry around, it does not need to download APP and plug and play features easily help you to play you phone musicOperation is simpler:Insert the usb bluetooth receiver and connect your device with it, the name is "BT" immediately transform your device into a fashionable wireless bluetooth device.Long Wireless Range: Stream and control your music with a reliable connection from up to 10 meters.