Perman Bluetooth Car Stereo Audio In-Dash FM Aux Input Receiver SD USB MP3 Radio Play Large-screen color LCD function, clear and bright, dynamic. PLL Synthesizer Tuner. Auto Store/Preset Scan. USB Connector,USB have music into USB conect can to play. SD Card Slot,SD card have music into SD conect can to play. Support Bluetooth, as long as your cellphone can support bluetooth, you can answer your call through the front panel (there is a small mic on the front panel), and you can play the music in your cellphone through bluetooth too. This is a very practical car stereo,Play music from four different sources. The FM radio uses MPX PLL tuning, can seek/scan, and stores up to 18 FM presets. You can plug in a USB stick or SD card loaded with MP3 or WMA files to listen to your favorite digital music  plus, the track info is displayed on the LCD screen. Or, use the conveniently located 3.5mm (1/8) aux-in port to plug in virtually any audio playing device, including iPod, iPhone,ipad,and all 3.5mm audio devices phones, MP3, MP4, etc.