Function 1. Radio frequency transmission function, built-in speaker.2. Support SD card, U disk (audio/video/)3. Bluetooth function4. Wired mobile screen, wired and wireless Android AUTO/ CarPlay5. Backward function (not including camera)System: The Whole systemRadio transmission frequency: 87.5~108.0MHz FMOutput power: Built-in 1W speakerOperating voltage: 12~24VBluetooth version: Version 5.1 (Default name: CarPlay)wifi frequency :2.4G/5G dual-bandGPS signal: Not supportedOperating memory :1Gbit DRAMSupport: mobile phone interconnection, reversing , built-in speakerAudio : MP3 / AAC//OGG / : M4A/RA/WAVVideo formats: H263 / H264 / H265 / //MKV HD / / MPEG/MP4 / WMV9 / ///QT : JPEG/PNG/BMP/GIF/Supported languages: English, , Spanish, Portuguese, Russian, , French, Polish, , , , Italian, , Japanese.Material: ABScolour: BlackPackage Contents:1 x 1 cable1 x suction cup support1 x remote control (without 2X AAA battery)1 x reverse video cable1 x English Instruction ManualOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.