[Product Function] SONRU Bluetooth receiver is used to update non-Bluetooth speakers, headphones, home stereo system, car radio speaker, etc. with Bluetooth function. So that you can pair these old audio devices with your phone or Pad and start listening to your favorite music! | [Multi Buttons] SONRU Bluetooth 5.0 receiver designed with multi buttons for more convenient operation. Adjust volume by pressing "+" and "-" button. Control next song and previous song by pressing right and left button. Play or pause music by press the middle button. Turn on or turn off the device easily by switch the “on/off” button. | [Hands-free Calling] It can achieve hands free calling in your car, more safe driving. The middle button can control calling when a call comes in, short press to answer/hang up a call, long press to reject a call, double press to redial the last call. | [Voice Assistant] Long press the middle button for 2 seconds to activate the mobile phone voice assistant function. | [Stable Connection] It equipped with a Bluetooth 5.0 chip for stable connection, fast transmission, 10M long signal range. | [Long Battery Life] Give it a full charge for 2 hours, it can play music for 16 hours. | [Memory Function] The Bluetooth adapter has an automatic connection memory function. It can auto connect the last paired phone when Bluetooth turn on again. | [Package Contents] The package included Bluetooth receiver, 3.5mm aux cable, 3.5mm audio adapter, charging cable, user manual. | [5-year Warranty] We also offer a 5-year warranty. If you have any problems or concerns, please feel free to contact our customer service team and we will solve the issue within 24 hours.