FM Transmitter, Bluetooth FM Transmitter- LBell Wireless Radio Adapter Handsfree Car Kit with Dual USB Ports and 1.4" Display Screen 1. EVEN BETTER- LBell Bluetooth FM transmitter updated with more features in the play music mode , now available play music through USB disk, TF Card, Bluetooth and Aux Cable. No gooseneck version for those who want a more sporty and compact touch in your car. 2. BIG LCD DISPLAY- Developed with 1.44 inches screen to better visualize your phone calls, musics, car battery voltage. Ideal sized screen to assist drivers without disturbing the experience while driving safely. 3. MORE SURPRISES- Firstly, supports TF/Micro SD memory card in FAT format up to 32G; Secondly, supports A2DP; Thirdly, supports MP3/WMA format; Finally, 12 MONTHS-WARRANT, please contact seller directly to initiate return and warranty process if the product has any defect. 4. GREAT ADVANTAGES- Compatible with most devices on the market (Apple, Samsung, Xiaomi, Oppo, Sony) you will not have problems with compatibility. Play your favorite songs in the sound of your car through Bluetooth, TF Card, Aux Cable. Advanced noise reduction system will guarantee you a quality crystal clear sound. 5. VOLTMETER FUNCTION- Safety when driving is our first concern, so we equip our devices with voltmeter. You can now check the quality of your battery before your trip or daily ride. Battery between 14.8V to 13.4V is when your car is on and moving. Battery between 12.8V to 12.2V is the normal voltage of the battery in your car parked and power off. Battery below 12V change the battery as soon as possible.