HUD-HUD is a driving recorder that conveys information based on satellites. -GPS system can measure the slope and inclination angle of off-road vehicles, as well as the inclination data of up and down slopes. -Provide vehicle speed, direction, engine load notification, with high-precision satellite real-time clock and direction functions. Helix angle: -40. ~+40Equipped with a slope header, an alarm will be issued when downhill or uphill exceeds 30 degrees.Safe driving reminder Multifunctional Display Features:Real-time measurement of the vehicle roll and pitch angle during driving, the range is -40~ +40. The current altitude of your car can be measured.GPS satellite positioning, make sure you don"'"t go in the wrong direction. Perfect for traveling and driving adcentures.Obtain the current driving speed, with over speed alarm function, as well as display the local time.Real-time voltage monitoring, can avoid safety hazards caused by too high or too low voltage, prolonging the lifespan of the battery.Suitable for all vehicles, such as vans, trucks, buses, cars, off-road cars, SUVs, and other Vehicles. Specification:Power supply: DC10V~30V;Operating temperature: -40C~+80C;Pitch angle: -40~+40;Roll angle: -40~+40;Voltage measurement range: DC10V~30V;Voltage measurement accuracy: 0.5V; Speed accuracy: GPS data refresh rate: 1s;GPS hot start: 1sAVGWireless transmission frequency: 2.4GHz;GPS cold start: 32sAVG SLOPE METER DISPLAY lntelligent slope systemHigh precision display GPS+BDS dual-mode chipReal-time monitoringCar battery voltageAutomatic turn on/offConnect by cigarette lighter cable work for 11.5-30V cars2 Alarm function Work all car