Smart QC3.0: The charging speed of QC3.0 is up to 4X faster than standard chargers and can charge compatible devices to 80% percent in just 35 minutes. And 2 devices can be charged at the same time with the Bluetooth FM transmitter.Bluetooth V5.0 & Crystal Clear Music:The Bluetooth V5.0 chip makes the connection faster and the data transmission more stable. With the built-in advanced cancellation technology, external environmental noise can be reduced well to provide lossless acoustic quality for music.Siri/Google Assistant & Hands-free Calls: This Bluetooth fm transmitter supports Siri/Google Assistant for voice guidance, like sending texts, incoming phone numbers or driving directions. Noise-cancellation technology dampens the road noise and gives you clear, crisp sound for hands free calls.7 LED Backlight: The 7 LED backlights can be changed from Red / Green / Blue / Yellowish Green / Purple / Cyan / Silver White, which integrating with music creates a relaxing and cool car environment for you. In addition, with the help of LED lights, it is easier to find and use the transmitter.Wide Compatibility: This Bluetooth adapter car can be used with any Bluetooth device such as iPhone, iPod, Galaxy, Sony, tablet and Android Smartphones. And it fits 12V-24V cars and trucks. Besides, you can enjoy music via Bluetooth/ USB Flash Drive (32GB) / MicroSD Card(32GB). (Only WMA MP3 WAV APE FLAC music formats in USB flash drive or MicroSD card are supported)