[Bluetooth 5.3 Clearer Sound and Enhanced Microphone] JOYROOM Bluetooth Car Adapter is equipped with the latest Bluetooth 5.3 technology, which optimizes the transmission delay and connection defect problems of the old Bluetooth 5.0. Bluetooth 5.3 will bring you a faster, more stable and smarter connection with less loss of sound quality. The upgraded CVC8.0 noise reduction and digital signal processor DSP technology, combined with the enhanced microphone, ensure brighter sound quality during calls.[Innovative LED Digital Display] Another unique feature of this portable bluetooth stereo adapter is its LED screen. Above, we can know the current status of various functions such as volume levels and exact power amounts. It can remind us to charge in time so that we can play music without interruption.[22 Hours of Ultra-Long Battery Life] Whether making calls or playing music, this car bluetooth adapter has a battery life of 22 hours. A full charge takes just 2 hours with a Type-C fast charging cable. In addition, this Bluetooth music receiver can also be used while charging. Makes music in the car so easy.[EASY TO USE] It doesn't get any easier than the JOYROOM bluetooth receiver, so if you have a 3.5mm jack and don't need a radio station, this is definitely the easiest way. Simply plug it into your car's aux input and enjoy hands-free calling with the built-in mic and Bluetooth range for music (40 feet). In addition, the receiver can pair two devices at the same time.