Features C 4.1 inch digital TFT screen C With SD / MMC card slot with USB 2.0 port C Bluetooth 2.0 support hands-free calls C 2 way video output 1 way audio output C Support high capacity TF card C Display song words and names C With rear camera function,the best backup cameras eliminate dangerous blind spots. Protect your car around of kids and little pets. C 2 remote controls are powered by 2 CR 2025 batteries C Max support 32G memory card Description System:wince Model:4022D Size:18.5*9.5*5.6cm Working Voltage:Dc 10.8V-14.8V Decoding chip:All wisdom C500 Screen size:4.1 inches Screen Resolution:800*480 Host depth:85mm Radio band:FM single band FM1 FM2 FM3 Radio chip:QN8035 FM:87.5M-108M SD card slot:Mini TF card Plug type:ISO universal plug Supported audio formats:MP3/WMA/WAV/OGG/FLAC/APE Supported video formats:RM/RMVB/MP4/FLV/MKV/3GP/AVI/ASF/SWFMP1/MP2 Image Format:JPG Sound Non-blance:??2dB Channel Separation:??56dB Language:English Waterproof Car Rear View Camera: Image Sensor: 1/3 CMOS Color Image Sensor Resolution: 520 TV Line Video Signal: PAL/NTSC Built-in Dynamic trajectory View Angle: 170?? Video Output: 1.0vp-p.75ohm Power Supply: DC9??36V Operating Temp: -30?? ~70?? Water Resistance: IP67 Suitable for all 9-36V car model Pakage1: 1* 4.1?Inch?Digital Screen Car Radio 1* Rear Camera(Optional) 1*Cables 1*User manual 1 * Remote Control(Without Battery)