Feature: 1. Bluetooth 5.0 chip supports long-term music playback and stable Bluetooth connection 2. It can also be used while charging, which make it more convenient. 3. With an embedded echo cancellation microphone, you can easily switch between music and phone with just one button. 4. Support Bluetooth hands-free calling and A2DP stereo 5. Support answering, hang up, reject, call back, etc. 6. Support for echo cancellation and noise suppression (CVC) technology during calls 7. After disconnecting for 5 minutes, the product automatically shuts down. 8. When the mobile phone calls, press the key once to answer the voice call. 9. After the call is completed, the music playback status is automatically switched back. 10. Press and hold the button '+' for the next song, short press to increase the volume. 11. Press and hold the button '-' for the previous track, short press to decrease the volume. 12. Connect this Bluetooth music receiver to your home stereo or car stereo using the supplied audio adapter 13. When two mobile phones are connected to the product at the same time, manually suspend one of them, and after switching the music for 5 seconds, you can switch to each other. Specification: Condition: 100% Brand New Item Type: Bluetooth Audio Receiver Color: Shown as Picture Bluetooth Transmission Distance: Approx. 15m/49.2ft How to use and pairing: 1. Press and hold the switch to enter the power-on pairing mode. The blue LED light flashes quickly during the pairing process. 2. Find the Bluetooth music receiver pairing name 'BT510' on your mobile phone or related transmitter. 3. At this time, the equipment is paired and connected. After the connection is successful, the Bluetooth LED 4. For some devices that require a pairing password, enter '0000' If you can't listen to music: 1. Make sure your stereo system is connected to the Bluetooth music receiver 2. Check to make sure your audio volume is not set to minimum or muted. The indicator light shows: 1. Pairing status: blue LED light flashes quickly 2. Pairing success: blue LED light flashes slowly 3. Charging: red LED light is on 4. Fully charged: the red LED is off The connection of the Bluetooth music receiver is based on the completion of the pairing, and the possible reasons for the connection interruption: 1. The distance between the equipment is more than /49.2ft (15 meters), or there are other obstacles in the middle (such as: wall, furniture, etc.) 2. One or both of them have been turned off, or it may be because there is no electricity. 3. The connection is not made within the specified time, the equipment is in sleep mode or the power is off. Solution: 1. Turn off the equipment and reconnect it. 2. Restart the music receiver and transmitter 3. Reconnect after reboot, pair 4. Charge the music receiver and transmitter again Package List: 1 x Host1 x Adapter1 x Charging Cable1 x Instruction Manual Note: 1. Please read your transmitter or mobile phone manual carefully to find out how to use its Bluetooth.2. If you want to use this Bluetooth music receiver to connect to other phones or transmitters, you must re-pair.3. Please confirm that the transmitter (smartphone, or other related equipment) is turned on and paired with the Bluetooth music receiver, and the equipment is within 15m/49.2ft.