The main function is to display the car dashboard information (e.g.speed, driving direction, local time, driving distance, driving time ), and keep the driver's eyes always on road to avoid the dangers of lowering the head to read the dashboard. Features: Adopting the high-performance processing solution, adopting dual-core, dual-operation, making data faster and more accurate. The multi-function display or simple function display can be switched freely. There are two new functions: accelerating competitive mode and brake performance test. This GPS smart digital meter displays many contents, including the driving speed, voltage, single driving distance, total driving distance, driving time, over speed alarm, and freely switching between kilometers & miles. Work for all vehicles, easy to install, plug and play. Specifications: Item Name: GPS Smart Digital Meter Main Material: ABS Display Size: 2.2 Inch Environment Temperature: -40- + 80 Atmospheric Pressure: 86-106KPa Relative Humidity: 10% -95% Environmental Noise: 60dB (A) Alarm Sound Level: 30dB (A) Working Voltage: 9V ~ 16Vdc (12Vdc / 400mA) Color: Black Size: 73*68*46 mm Package Information: Package Size: 14.3*9*5.1cm Package Weight: 180g Package List: 1 * Head Up Display Unit 1 * Cable 1 * Non-Slip Mat 1 * User Manual