1、Support near field pairing, automatically turn on or turn off Bluetooth wireless connection during pairing. 2、3.5mm for AV audio output interface, more compatible, with high performance. 3、Using power isolation technology to ensure perfect sound quality, high‑quality audio. 4、Press the power button for 3 seconds to turn on and it will automatically connect to the phone or other equipment you used last time. 5、The bluetooth effective distance is 15m/49.2ft, the transmission speed is fast, and the distance is wide. Item Type: Bluetooth 5.0 Receiver Material: ABS Color: As Picture Shown Weight: Approx. 160.0g/5.6oz Frequency 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 to use: 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. 1 x Bluetooth 5.0 Receiver 1 x 3.5mm Cable 1 x for RCA Cable 1 x USB Cable 1 x Manual