Features 1、Wide compatibility, support multiple audio output ports, can connect with 3.5mm headset, stereo system, speaker. 2、Support USB 5V DC output, also can charge for iPadOS, for iPhone. Small, lightweight and portable, convenient for carry. 3、Support for All Bluetooth audio device, support for NFC available device. Faster transmission speed, and more stable device connection. 4、Support near field pairing, automatically turn on or turn off Bluetooth wireless connection during pairing. 5、Using the latest power isolation technology to ensure perfect sound quality, high‑quality audio, let you feel fever‑level music. Specifications Item Type: Bluetooth Receiver Material: ABS Color: Black Product Size: Approx.110x70x30mm/4.33x2.76x1.18in Weight: Approx.144g/5.1oz Interface: Stereo analog Model: BT300 /AUX3.5mmt Spdif OUT Frequency Response Range: 10Hz-20kHz Output Impedance: 75 ohms Signal to Noise Ratio: >110dB Decoding Chip: V5.0 Distortion + Noise: <0.02% Effective Distance: 15m/49.2ft Bluetooth Version: 5.0 Performance: HiFi level Support: A2DP/AVRCP How to Use 1: 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 in the "Indicator Window" and hear the prompt tones 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 "BT300", and click Connect after the search is successful. 3. After clicking connect, the blue light of the "indicator window" flashes slowly and you hear the prompt tones. This indicates that the device is successfully connected. Note: The next time you use it, you only need to press the power button for 3 seconds to turn on the phone and it will automatically connect to the mobile phone or other equipment you used last time. 2: Connect via pairing 1. First, connect the USB power supply line to the 5V power supply. Seeing the blue indicator light in the "indicator window" flashing and hearing the prompt tones indicates that the desktop Bluetooth audio receiver has successfully entered the pairing standby state. 2. Turn on the function of the mobile phone or other device. Note: You can turn off the Bluetooth of your phone or tablet when you don’t need to use the desktop Bluetooth audio receiver for the paired mobile phone or tablet. You don’t need to turn on the Bluetooth manually when you use it next time. You only need the desktop Bluetooth audio receiver. Turn on the phone and touch the sensing area of the mobile phone to the sensing area of the desktop Bluetooth audio receiver to automatically connect back. Also in the Bluetooth connection state, the device will automatically disconnect the desktop Bluetooth audio receiver and turn off the mobile phone when the device is close again. Bluetooth function in order to achieve the purpose of power saving. Function Description 1. Volume addition and subtraction and the control of the previous and next song: When the music is playing, short press the volume up button to get the next song, and short press the volume down button to get the previous song. Long press the volume up button to increase the volume, and long press the volume down button to decrease the volume. 2. Multi-function button, when playing music, short press to pause or play music. 3. Power supply: As long as you use Micro USB male connector DC5V 50MAH or more for power supply. Package List 1 x Bluetooth Receiver 1 x Audio Cable 1 to 1 1 x Audio Cable 1 to 2 1 x USB Cable 1 x Instruction Manual