1. Intelligent and fast charging - Input voltage: 12-24V - Output: two USB ports with PD 20W and QC3.0 - Supports simultaneous fast charging for two devices 2. Special design for ease of use and visibility - Large key for easy operation - 1.7 inch LCD backlight display shows song name or incoming phone number - When the car starts, the display also shows the car battery level - LCD display can be rotated 270 degrees on a gooseneck for optimal viewing - To turn off the FM transmitter while keeping charging active, long press the next song key for 5 seconds 3. Broad compatibility and flexible playback - Works with tablets and smartphones - Music can be transferred to car audio from connected devices via a 3.5 mm audio cable - Supports TF/Micro SD cards in FAT format up to 32GB - Supports A2DP, MP3 and WMA formats - Also supports AUX output 4. High quality sound and clear calls - Advanced interference and noise cancellation technology (CVC) provides full duplex sound and reduces wind and background noise - Built-in microphone supports hands-free calling with reduced interference Use scenarios - Daily driving with simultaneous charging and music streaming: charge two devices via PD 20W and QC3.0 while playing music from your phone through the car stereo using AUX or 3.5 mm connection, with on-screen track and caller information for convenience. - Long trips with offline music: load MP3/WMA files onto a TF/Micro SD card (up to 32GB FAT), insert into the adapter, and enjoy music without relying on your phone, while keeping devices charged. - Flexible control and hands-free communication: use the LCD display for easy access to song titles or caller IDs, adjust the screen position with the 270-degree gooseneck, and use the built-in microphone for clear, hands-free calls. Specifications recap - Input: 12-24V - Output: USB PD 20W and QC3.0 (two ports) - Display: 1.7 inch LCD backlight with song name or incoming caller, car battery level when engine starts - Display adjustability: 270-degree rotatable gooseneck - FM transmitter control: turn off by 5-second long press on the next song key - Memory/compatibility: TF/Micro SD FAT up to 32GB; A2DP; MP3/WMA; AUX output - Audio connectivity: 3.5 mm auxiliary input for device to car audio transmission - Noise reduction: CVC technology for improved call quality and reduced wind/background noise - Microphone: built-in for hands-free calls