HiFi Stereo Sound: JOYROOM Bluetooth receiver is equipped with the latest Bluetooth 5.3 technology, optimizing transmission delay and connection defect issues of the old Bluetooth 5.0. Our Bluetooth 5.3 adapter will provide you with a faster, more stable, and smarter connection with less sound quality loss, up to 100 feet working distance, enough for daily use. Clearer Calls: The Bluetooth car adapter is equipped with dual microphones that work in tandem to capture your voice from 360 for smoother calls. The upgraded CVC8.0 technology and built-in filter IC effectively filter out more road noise, stream noise, and other distractions, resulting in clearer hands-free calls at both ends of the line. Plug and Play: Simply plug it into the 3.5mm auxiliary jack and power it via the USB port. Start your car, and the Bluetooth car adapter will automatically pair with your phone instantly. It also allows users to pair and connect two devices simultaneously to easily enjoy music and hands-free calls. Multifunction Button & LED Light Design: The independent button design of the Bluetooth receiver supports one-touch track up/down, volume up/down, answer/hang-up calls, and redialing. Easy to use, distraction-free, and safer driving. The LED light makes it easier to find buttons when night falls. Multi Safety Protection: JOYROOM Bluetooth adapter strictly adheres to national quality standards and has passed FCC, CE, RoHS, BQB, and other certifications. The AUX Bluetooth adapter has built-in voltage protection, overcurrent protection, short-circuit protection, and NTC overheat protection, ensuring our equipment is safe to use.