This car can apply for with interface, designed for safe driving. It has a 3.5 inch screen. It dispalys many informations, including vehicle speed, real time, over alarm, , and etc. Its brightness can be adjusted automatically and manually. Power on/off automatically. Features: - Color: Black. - Material: ABS. - size: 9 x 5.4 x 1.2cm (LxWxH). - Apply for with interface. - Dispaly many informations, including vehicle speed, real time, over alarm, MPH, and etc, designed for safe driving. - Very easy to plug and play. - Can bear high temperature. - Over warning - alarm will keep warning driving. - The brightness can be adjusted automatically and manually. - Flexible non-slip mat, put it anywhere you want, even the uneven place. - Black surface the unwanted reflection. - Working voltage: DC8-18-24V. - Working current: 40mA. - Sleeping current: 15mA. - : ±1°. - 12V car charger: 1000mA, USB cable. Package list: 1 Display Digital Universal Car Speedmeter Over Reminder MPH (Black)