MULTI-FUNCTION: This Bluetooth FM transmitter can transmit audio files from mobile devices to car stereo system via FM radio signal. It can play music files in the FLAC WAV MP3 WMA formats on a TF card with a capacity of up to 32GB (Please insert the TF card into the device while using it will automatically detect and play music in the TF card). With 3.5mm audio port it supports AUX input/output.</br>HANDS-FREE CALLING STEREO SOUND QUALITY: Simply paired your phone with the Bluetooth Adapter and its hands-free system can set free your hands during answer the calls and let you safely drive. CVC Technology creates full duplex sound Noise and Wind will be suppressed (Please select an unused FM frequency and turn the FM transmitter into the same frequency).</br>LARGE DISPLAY SCREEN DESIGN: 1.44 inches amazing screen is allowed to clearly display current voltage of the storage battery of your car also the song names of TF card or caller ID.</br>QUICK CHARGE: 5V/2.1A USB car charger can charges your favorite mobile devices fast and it can automatically adjust the output power to different smart phone.</br>BROAD COMPATIBILITY: Universal design for all types of devices! You can use it as an Apple iPhone 7/6/6plus/6s?? Hands-Free Calling and Car Charger?? or for charging iPads?? other smartphones and tablets?? GPS units?? iPods?? MP3 players and more.</br></br>Product Description</br></br><b>Multi-function</b><br><br>You can listen to your favorite music from your mobile device to this transmitter via Bluetooth and this gadge