Features: 1. In Transmitter mode, turn a non-Bluetooth TV, PC, CD player, for iPod, MP3 / MP4 into Bluetooth transmitter. Receiver mode: Ideal for home or vehicle music streaming sound system. 2. Simply connect this bluetooth audio receiver to your line-in or auxiliary input on your speakers, pair it to your Bluetooth enabled device, and enjoy the wireless music revolution. 3. Whether you want Bluetooth convenience in your car, through your home-theater system, in your kitchen, bathroom, or bedroom,etc. 4. Simple operation,3.5mm Male to Male Audio Connector or 3.5mm Male to Male Audio Cable to connect the speakers and the receiver. 5. Powerful bluetooth IC,More stronger compatibility. 6 Bluetooth 5.0 :Enjoy faster and more stable connections with the latest Bluetooth 5.0 technology. 7 Audio Transmitter and Receiver :This adapter can be used as both a transmitter and receiver, allowing you to connect your TV or car audio system to your phone or other devices wirelessly. 8 The adapter comes with a 3.5mm AUX jack, making it easy to connect to a wide range of devices. Functions: Transmission mode (suitable for sending computer/TV/radio/MP3 audio to Bluetooth headset/stereo) Receiving mode (suitable for ordinary audio/car/wired headset, etc.) Transmit/Receive mode Switch: The audio cable is inserted into TRANSMITTER for transmission mode, and the indicator light is blue The audio cable is plugged into RECEIVE for receiving mode, and the indicator light is red Plug in the computer for launch mode, no need to plug in the audio cable, just plug in the USB Specifications : Bluetooth version: 5.0 Technology: BT5.0, AVRCP (receiver mode only), A2DP Operating range: up to 10 meters/33 feet (no obstacles) Transmitter mode: blue LED light is on Receiver mode: red LED light is on Packaging: 1 x USB Bluetooth 5.0 Receiver Transmitter 1 x Audio Cable