Description: In transmitter mode, turn non-Bluetooth TV, PC, CD player, iPod, MP3/MP4 into a Bluetooth transmitter. Receiver mode: perfect for home or car music streaming sound system. 2. Connect this Bluetooth audio receiver to the line input or auxiliary input on the speaker, pair it with your Bluetooth device and enjoy the wireless music forrevolution. Whether you want to enjoy the convenience of Bluetooth in your car, through your home theater system, in the kitchen, bathroom or bedroom, etc. Simple operation, 3.5mm male to male audio connector or 3.5mm male to male audio cable to connect the speaker and receiver. Powerful Bluetooth IC, stronger compatibility. 7. Powered by built-in rechargeable lithium-ion battery through mini USB port, long working time and low power consumption. (Mini USB cable included) 8. You can play music through the car and answer calls through the built-in microphone. Specifications: Material: ABS Color: Black Bluetooth version: V5.0+EDR Bluetooth protocol: AD2P Working distance: 10 meters Function: Bluetooth audio receiver/Bluetooth audio transmitter Package includes: USB Bluetooth audio adapter*1