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 B1(Non generic)1. Only suitable for gasoline vehicles. Not suitable for diesel vehicles, hybrid gasoline vehicles, and other modified vehicles. 2. Compatible with OBD2 system. (with year restrictions) 3. Some special models are not compatible (see below)NOTEThe following common vehicle types are not applicable to OBD2:Incompatibility: US models: Dodge, JEEP, Sail, Chrysler, 2004 and pre 2004 models Incompatibility: Legal and Italian models cannot be used: such as Fiat, Maserati, Lamborghini, DS, Logo, Citroen, Renault, Simca, Amilka, etc. Incompatibility: Japanese models not available: Suzuki, Mazda 6, Infiniti (QX50 q50 q501), 2013 Toyota Avanza, Lexus (is250, ex250, ES300H) Honda (jazz, CRV), and cars produced before 2008. Incompatibility: Some Korean Kia and Hyundai models (2013 Hyundai Sonata, 2017 Kia Soul PS, etc.) Incompatibility: All brands of gasoline electric hybrid and diesel vehicles, pickup trucks, motor homes, cars retrofitted with automotive computers, Swiss Volvo, Chrysler Group, and Fiat Group.