[Bluetooth 5.3] --- The Bluetooth transmitter and receiver is converts non-Bluetooth devices to Bluetooth devices for wireless connection. Meanwhile, the built-in Bluetooth 5.3 chip can receive Bluetooth signals within 10 meters. Suitable for cars, speakers, stereo systems, headphones, etc. [LED Display & TF Card Reading] ---The Aux Bluetooth adapter has been upgraded with an LED display that allows you to directly view information such as current battery level and volume. Switch to TF card reading mode, so you can have a wireless Bluetooth MP3 instantly. [Hands-Free Calling] --- For safe driving and calling experience, this car Bluetooth adapter features the hands-free calling function, so you can enjoy a clear calling experience while concentrating on your driving and meet your efficient calling needs. [Long Battery Life] --- The 3.5mm Bluetooth adapter is equipped with a Type-C fast charging port, which reaches full charge in 1 hours and provides up to 9 hours of use. Supports charging while using, so you will never have power anxiety again. [Lossless Sound Quality & Noise Reduction] --- The Bluetooth stereo adapter supports lossless audio resolution in MP3, WAV, WMA, FLAC, APE, etc., and adopts CVC noise cancellation technology to remove noise for clearer sound quality, So you can enjoy high-quality call sound quality and streaming sound quality at all times, whether at work or in life.