[Multiplayer mode]: A: Via Bluetooth; B: Via Micro SD card (support MP3, WMA, WAV format); C: Via U disk; D: Via 3.5mm audio cable (MP3 player, tablet computer, etc.) You can play music in the above four ways. Virfine car Bluetooth FM transmitter always meets all your needs. $ [Faster dual USB ports]: Support charging 2 devices at the same time. The 5V/2.1A USB interface is used for fast charging, and the other with a USB icon is used to read the U disk, and it can also be used as a USB charging interface. The Bluetooth FM transmitter always hopes that your phone has enough power. $ [Excellent large screen]: The large 1.44-inch screen can display caller number, car battery voltage level, volume, FM frequency and song name, if you play music from Micro SD card or USB flash drive. You can read easily at night and during the day. The FM Bluetooth transmitter always strives to prevent you from being harassed by unfamiliar calls while driving. $ [Real flexibility and convenience]: The flexible neck can be adjusted to a perfect angle of view, which is convenient to use; the memory function makes it possible to automatically connect to the last paired mobile phone. CVC noise cancellation technology makes hands-free calls and music playback extremely clear. The Bluetooth car adapter always focuses on every detail. $ [Smooth hands-free call]: Just press a button, you can easily and safely answer the hands-free call. The radio transmitter can also be paired with all Bluetooth-enabled devices, such as LG, Samsung, tablets, HTC, Sony and other Android smartphones; it is suitable for all cars/trucks (12-24V).