[UPGRADED BLUETOOTH 5.4] The Bluetooth radio transmitter has been upgraded to Bluetooth version 5.4. Faster, smarter, and more reliable connection speeds. Easily pair in one second and reconnect instantly, no need to re-pair.[54W FAST CHARGING] This Bluetooth car adapter features upgraded 36W USB-C and 18W QC fast charging technology, which allows it to quickly charge two devices at the same time, charging most devices from 0% to 60% in just 35 minutes.[HANDS-FREE CALLING] Car Bluetooth adapter uses CVC noise suppression technology and echo cancellation for high-quality uninterrupted calling, ensuring clear and crisp call quality. Answer/redial/hang up or end a call with a single button click.[SUPERIOR MUSIC STREAMING] Bluetooth audio receiver provides an excellent and pure music streaming experience. Supports connecting Bluetooth devices to play various music apps or video audio, and can also play songs in USB flash drives. Supports playing various audio files to meet your music needs.[LED BACKLIGHTING] The modern FM transmitter adapter has a charming rainbow light function. Press the light button to turn off the light when not needed, creating a perfect driving atmosphere.[MULTIPLE SAFETY PROTECTIONS] Bluetooth aux adapter has high-performance intelligent protections such as over-current, over-voltage, over-load, over-heating, and short-circuit, ensuring safe charging while driving! Compatible with 12V-24V cigarette lighter sockets and 99% of all smartphones.