Desktop Bluetooth 5.0 Receiver Low Latency Audio Adapter 3.5mm AUX Optical SPDIF Item Type: Bluetooth 5.0 ReceiverMaterial: ABSColor: As Picture ShownWeight: Approx. 160.0g/5.6ozFrequency Response Range: 10Hz-20KHz Signal to Noise Ratio: >110dB Distortion + Noise: <0.02% Bluetooth Version: 5.0 Bluetooth Name: For BT300 Interface: Stereo Analog/AUX3.5MM/spdif OUT Impedance: 75Ω Decoding Chip: V5.0 Effective Distance: 15m Support: A2DP/AVRCP How e: Connect via Bluetooth pairing: 1. First connect the USB power supply line to the 5V power supply. After connecting to the product, you will see the blue indicator light flashing and hear the prompt sound to indicate that the desktop Bluetooth audio receiver has successfully entered the pairing state. 2. Turn on the Bluetooth function of the mobile phone or other device, search for the device named for "BT300", and click Connect after the search is successful. 3. After clicking connect, the blue light flashes slowly and you hear the prompt sound. This means that the device is successfully connected. Note: The later time you use it, you only need to press the power button for 3 seconds to turn it on to automatically connect to the mobile phone or other equipment you used last time.