JOYING Quad Core Rk3188 Android 4.4.4 Kitkat Car Stereo Radio 6.2 Tablet Head Unit 800480 Resolution GPS System OS: Android 4.4.4 Kitkat; CPU: RK3188 1.6GHz Cortex A9 Quad Core; Screen Capacitive Mulit touch screen, Support Mirror link, Bluetooth,WiFi, 3G/4G hotspot sharing, Navigation 2D/3D map, Voice guidance..(Please visit YouTube "Joying" if you want to know more about our products) 1. Steering wheel control: https://www.carjoying.com/Joying-blog/15.html 2. Backup camera: https://www.carjoying.com/Joying-blog/7.html Installation Size: 178*100mm; Comes with ISO harness If you have any question about our products, please contact us immediately. With 11 Year production experience, we can offer Professional Technical Support.