In transmitter mode, turn non-Bluetooth TV, PC, CD player for iPod, MP3 or MP4 into Bluetooth transmitter. Receiver mode: very suitable for home or car music streaming sound system. Simply connect this Bluetooth audio receiver to the input or auxiliary input on the speaker and pair it with a Bluetooth-enabled device to enjoy the revolution in wireless music. Whether you want to use Bluetooth in the car, through the home theater system, in the kitchen, bathroom or bedroom, it is very convenient. AptX audio codec can provide richer and deeper sound experience. Listen to CD-like audio quality without compromise. Simple operation, use 3.5mm male-to-male audio connector or 3.5mm male-to-male audio cable to connect the speaker and receiver. Powerful Bluetooth IC, more compatible. Powered by built-in rechargeable lithium-ion battery through mini USB port, long working time and low consumption. (With mini USB cable) You can play music through the car and answer the call through the built-in microphone. Material: ABS Colour: Black Bluetooth version: V5.0andEDR Bluetooth protocol: AD2P Working distance: 10 meters Function: Bluetooth audio receiver or Bluetooth audio transmitter Package Included: USB Bluetooth Audio Adapter x 1 AUX cable x 1 Instruction manual x 1