MSD168 2 in 1 Bluetooth Transmitter Receiver Mini 3.5mm AUX Stereo Wireless Bluetooth 5.0 Adapter For Car TV PC MP3 1.Transmitter modeWirelessly streams audio from your Non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones speakersreceiver. 2.Receiver mode Wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. 3.Mode switching: 1. If the device has been in a mode for a long time, it needs to be re-energized twice to switch to another mode. 2. If the device has just switched mode, you want to immediately switch to another mode, you only need to re-energize once. 4.Pairing method RX mode: Please connect the product to the audio device with a 3.5mm audio cable and find MSD168 in the Bluetooth settings of the phone to pair. The blue light flashes during the pairing process, and the blue light stops flashing after the pairing is successful. TX mode: Please connect the product to a device such as a TV with a 3.5mm audio cableRCA audio cable, TX mode will automatically search for other Bluetooth receiving devices (such as Bluetooth headset, Bluetooth speaker, Bluetooth receiver, etc.), the red light flashes during pairing, and the red light stops flashing after pairing succeeds. Model: MSD168 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m 33ft (without any blocking objects) Pairing name(Receiver mode ): MSD168 Transmitter mode: Red LED light is on Receiver mode: Blue LED light is on Dimensions: 34mm*17mm*12mm Packing list: 1x Bluetooth 5.0 Audio TransmitterReceiver 1x 3.5mm Aux Cable(1M39in) 1x User Manual