VicTsing Bluetooth FM Transmitter Radio Adapter with USB Port 1.44 Inch Display, for iPad iPhone 7 6S 6 5S Sony BlackBerry Nokia Motorola, Other Smart Phones 1.Multi-function. This Bluetooth FM transmitter can transmit audio files from mobile devices to car stereo system via FM radio signal. It can display incoming phone number and monitor the voltage of car battery. It can play music files in the.FLAC, .WAV, .MP3, .WMA formats on an TF card with a capacity of up to 32GB. 2.Large Display Screen. 1.44 inches screen is allowed to clearly display: name of English/Chinese song, voltage of car battery and incoming phone number. 3.Voice Prompt. When it is pairing or Bluetooth is connected, voice prompt will tell you whether this device is connected successfully or not. This device has memory function. It will automatically connect to its memorized paired Bluetooth devices when power on. 4.Hands-free Calling. With this wireless device, you can conveniently answer/ hang off/reject/redial calls through hands-free function. Noise and wind will be suppressed by CVC technology to create full duplex sound quality. With 3.5mm audio port, it supports AUX input/output. 5.Fast Charging. With 5V/2.1A charging port, gives you fast and effective charging experience.