Wireless In-Car Bluetooth FM Transmitter Radio Adapter Car Kit W USB Charger Support USB Flash Drive Micro SD Card AUX Input Output 1.44 Inch Display, 2017 Model, . SUPER WIDE COMPATIBILITY - Nulaxy KM20 car FM transmitter Works with Bluetooth enabled devices, like iPhone, iPad, iPod, Tablet, Smartphones or MP3, MP4 Players via 3.5mm audio jack. It provides multi-solutions for hands-free phone calling and in-car stereo streaming. • 2. BIG DISPLAY SCREEN - Car battery voltage level will be detected and displayed on 1.44” LCD screen while the car starts; phone number for incoming calls & name of songs playing through TF Cards and USB flash driver could be displayed as well (songs via Bluetooth will not display). • 3. CRYSTAL SOUND QUALITY - KM20 FM transmitter utilized most advanced interference and noise cancellation technology, to grant most crystal sound quality. Due to radio frequency interference and car ground loop noise, it is almost impossible for any transmitter to produce a perfect audio, but Nulaxy does one of the best work in the market. • 4. DUAL CHARGING PORTS - One 5V-2.1A USB charging port to get your phone full charged in short time, and the other is designed for reading USB files. • 5. EXCELLENT STEREO SOUND - Built-in microphone feature supports hands-free talking and music streaming; support TF/Micro SD Card in FAT format up to 32G; support A2DP; support MP3/WMA format songs in Normal/Shuffle/Repeat play modes in TF Card and USB flash drive only; support AUX output and input.