Receive function Instructions: 1. Insert the USB power supply terminal of the device into the USB port to power on, and the device's red indicator light flashes quickly, and it enters the Bluetooth receiving state; AUX 2. Plug the 3.5mm audio end into the AUXport of the playback device (headphones, speakers, etc.); 3, turn on your phone (or computer) Bluetooth function, and search the surrounding Bluetooth devices found in the search results of a DL-LINK device called paired, the pairing is successful red light flashes slowly. Features.: 1. Bluetooth 5.0: new Bluetooth 5.0 wireless transmission technology, bringing more stable audio transmission capability. 2. Multi-function: Connect the product to the USB port and AUX port of your device, use it in the car, or connect it to the audio, travel, or home, it can accompany you. 3. one tow two: no need to download any driver, you can connect two devices at the same time. It's a great way to get rid of the single and add more fun to use. 4. easy to use: plug and play, automatically connect back to the power on. Specification: Product Model: RT08 Pair name: RT08 Bluetooth version: 5.0 Sensitivity: -42±dB Signal-to-noise ratio: greater than 90dB Audio transmission mode: SBC Bluetooth delay time: less than 200ms Effective transmission distance: ≤10m Bluetooth indicator: Blue LED Frequency range: 2400-2483.5MHz Package includes: 1x USB Bluetooth 5.0 adapter