Welcome to our store! 1. Bluetooth 5.0 chip supports long-lasting music playback and stable Bluetooth connection. 2. It can also be used while charging, making it more convenient. 3. With a built-in echo-canceling microphone, you can easily switch between music and calls with just one button. 4. Supports Bluetooth hands-free calls and A2DP stereo. 5. Supports answering, hanging up, rejecting, and redialing calls. 6. Supports echo cancellation and noise reduction (CVC) technology during calls. 7. The product automatically powers off after being disconnected for 5 minutes. 8. When your mobile phone rings, press the button once to answer the voice call. 9. After the call ends, the music playback status automatically resumes. 10. Press and hold the '+' button for the next song; short press to increase volume. 11. Press and hold the '-' button for the previous track; short press to decrease volume. 12. Connect this Bluetooth music receiver to your home stereo or car stereo using the included audio adapter. 13. When two mobile phones are connected to the product simultaneously, manually pause one of them. After switching music for 5 seconds, you can switch between them. Item Type: Bluetooth Audio Receiver Color: As shown in the picture Bluetooth Transmission Distance: Approx. 15m/49.2ft How to Use and Pair: 1. Press and hold the power button to enter pairing mode. The blue LED light will flash rapidly during the pairing process. 2. Find the Bluetooth music receiver's pairing name 'BT510' on your mobile phone or related transmitter. 3. The device is now paired and connected. After a successful connection, the Bluetooth LED will indicate the status. 4. For devices requiring a pairing password, enter '0000'. If You Cannot Hear Music: 1. Ensure your stereo system is connected to the Bluetooth music receiver. 2. Check that your audio volume is not set to minimum or muted. Indicator Light Display: 1. Pairing Status: Blue LED light flashes rapidly. 2. Pairing Successful: Blue LED light flashes slowly. 3. Charging: Red LED light is on. 4. Fully Charged: Red LED light is off. Bluetooth Music Receiver Connection Issues and Solutions: Possible causes for connection interruption include: 1. Distance between devices exceeds 15 meters (49.2ft), or there are obstructions like walls or furniture. 2. One or both devices are turned off, or have no power. 3. Connection is not made within the specified time, leading to device sleep mode or power off. Solutions: 1. Turn the equipment off and reconnect. 2. Restart the music receiver and transmitter. 3. Re-pair after restarting. 4. Recharge the music receiver and transmitter.