Bluetooth FM Transmitter, YOKKAO MP3 Player Car Charger Hand-free Car kit USB Output 5V/2.1A 1.4CID Support Micro SD/TF Card Reader Slot with 3.5mm Audio Port for Smarphone Devices NOTE - Please make sure your car space is big enough to accommodate this car kit. please do not violently rotate the head of this product when you use it (the rotation angle shall not exceed 90 degrees). 1.44 INCHES SCREEN - You can see the screen clearly(the name of English/Chinese song, the voltage of car battery and incoming phone number). MUSIC FORMAT - MP3/WMA(TF card),WAV, FLAC. You can also stream music via a 3.5mm cable from an MP3 player, cell phone, tablet or any other device. EASY YOUR LIFE - Simply paired your phone with the Bluetooth FM transmitter and let you safely drive while answer the phone. Built-in microphone which can offer you clear talking and wonderful music. ATTENTION - Please don't choose frequency that has local radio station to avoid interference. It might be unable to read your micro SD card if there are too many things in your card.