Product FeatureMore Smooth & Stable: Common meter only has OBD mode, but ours is dual mode: OBD+GPS 2-in-1, the default display OBD+GPS function at the same time, and data display is more abundant. Clear and Intuitive Display: The tachometer"'"s analog display has a pointer that moves to indicate RPM, so you can visually identify the engine RPM value. With 12 display screens, you can switch to your preferred screen at will. The digital speed readout is easy to see at a glance, so you can concentrate on driving without looking down at the dashboard, avoiding distractions and even accidents. Fault Code Clearing:When the engine warning light in your car"'"s instrumentation comes on, it indicates that something is wrong with the car, but with the speedometer, you can clear the codes yourself without having to spend money at the repair shop. There"'"s also an acceleration test and a brake test so you can get a better idea of your car"'"s performance. Alarm Functions: During normal driving, the ambient light automatically adjusts the brightness according to the environment. When too high water temperature, too low voltage, too high vehicle inclination, speeding, and other driving abnormal, the ambient light will be changed to Red color for alarming. make your journey more secure! Compatible Cars:OBD2 only be available for vehicles produced after 2008. GPS MODEL Perfect Suitable for All Vehicles. Note: If your car is not compatible with OBD mode, please use GPS mode. OBDll mode is not compatible with a hybrid electric vehicle, diesel car, pickup truck, RV, computer modified car.Note OBD2 mode Main Function: Speed, RPM, clock, water temperature, fuel consumption, driving distance, driving time, driving direction, voltage, instantaneous fuel consumption, average fuel consumption, engine load, exhaust temperature, Car outside temperature, turbo pressure, longitude and latitude, number of satellites, altitude, oil temperature, intake temperature, oil pressure, fuel pressure, fuel pressure, Slope angle, Pitch angle, Acceleration test, Brake test. Alarm functions:RPM, Overspeed, water temperature, oil temperature, exhaust temperature, oil pressure, turbo pressure, fuel pressure, engine overheating, low voltage, excessive angle tilt, engine failure, engine load GPS mode Main Function: Speed, clock, voltage, driving distance, driving time, driving direction, longitude, latitude, altitude, number of satellites, slope angle, pitch angle, acceleration test, brake test. Alarm functions:Overspeed alarm, Voltage alarm, Fatigue driving reminder, and Tilt alarm.Product Specification TypeHUDMaterialABS+PCColourBlackDisplay Type3.5-inch LCD ScreenTwo Installation MethodsStand on dashboard/upside down on windshieldApplicable ModelsUniversalDual SystemOBD2 + GPS, If your car"'"s OBD2 Protocol is incompatible, then you can choose GPS Working System, GPS mode can work with all cars Package Included 1 x OBD+GPS Speedometer 1 X Mount 1 x OBD Cable 1 x Anti Slip Mat 1 x Crowbar 1 x Manual