6.It only takes 4.5 seconds to boot up, faster than other device. 5. High temperature Resistant Design. Chip heat generation is smaller, working temperature: -20? ~ +70?, storage temperature: -40? ~ +85?, Can be in 80 ? high temperature test box continuous normal work for 48 hours. 4. Eliminate the fan design to solve the 8.8inch noise issue. 3. Add DSP Functions.You can set different sound effects according to your preferences and enjoy different music styles anytime anywhere. 2. Add Automatic light-sensitive brightness adjustment function. it can adjust the brightness automatically when passing through tunnels and underground garages, and switch day and night modes automatically , making driving safer. 1. With smaller design, bigger display, the 8.9 inch car stereo does not take up area and not affect your driving vision. Linux 4 system, 1920*720 resolution, 2G DDR3 Main Chip, running twice faster than 8.8 inch,Smooth operation. 2D glass material, looks more beautiful and High-end atmosphere. ?Compare to 8.8 inch, The newest 8.9 inch touchscreen adds these following functions?:. ?Compatible with all models?Road Top 8.9 inch car audio powered by cigarette lighter,12-24V voltage, suitable for almost all kinds of years of the cars and trucks. ?Road Top Newest 8.9 inch Touchscreen?Road Top 8.9" portable car stereo supports Wireless Apple Carplay & Android Auto. After link wirelessly, puting all your phone’s best features in a clean, safe, and easy-to-use hd touchscreen, wirelessly handle gps navigation, messaging, phone calls, bluetooth music, Siri.