Specifications Display: 2.8Inch Ambient Temperature: - 40~ + 80 Atmospheric Pressure: 86-106KPa Relative Humidity: 10% - 95% Environmental Noise: <=60dB (A) Alarm Level: =30dB (A) Working Voltage: 9V~16Vdc (12Vdc/400mA) Water Temperature Warning: Yes Over-speed Alarm: Yes Shifting Reminding: Yes Package Size: 14.3* 9* 5cm/5.6* 3.5* 2in Package Weight: 169.8g/6oz Description The main function is to display the car dashboard information( e.g.speed,driving direction,local time,driving distance,driving time ) ,and keep the drivers eyes always on road to avoid the dangerous of lowering down head to read the dashboard. Features Widely Use, Work for all the vehicles, cars, SUV, truck, ect. Easy Installation, plug and play. Rich Contents:driving speed,voltage,single driving distance, total driving distance,driving time,over speed alarm, freely switch between kilometers&miles. New functions: accelerating competitive mode & brake performance test & read the whole vehicle data stream. TFT LCD super HD screen, can see informations from HUD more clearly even in the daytime.