Features: 1.Multifunctional: This HUD can not only display the speed of the vehicle in time, but also display the driving direction, single driving time, and single driving mileage through the compass. 2.Timely and Accurate: The speed and compass data come from satellites, which are timely and accurate, especially the direction of the compass is not affected by the magnetic field. 3.Easy to Read: Large screen size display, large and green fonts, 7 colors can be switched at will, reading is easier and more comfortable, protects the driver's eyes, especially suitable for long distance driving. 4.Safe and Reliable: The shell is made of high temperature resistant ABS material, which will not deform at 80 for 3 hours. No built in battery, does not explode at high temperature. 5.Applies to All Vehicles: Collecting speed from GPS satellites. Regardless of car engine, HUD is compatible with all vehicles including cars, trucks, pickups, suvs, scooters, trains, motorcycles, bicycles, boats. Specification: Item Type: Car HUD Material: ABS + Metal Function: Vehicle speed, single mileage, driving direction, number of stars searched Support KM/H and MPH free switching Alarm: Speeding alarm, Fatigue driving reminder Characteristic: Adjustable display color, 7 colors for 1 machine Applicable Models: Cars, SUVs, trucks, RVs, vans, buses, motorcycles, etc. PackageList: 1 x Car HUD 1 x Mounting Bracket 1 x Power Cord 1 x Instruction 2 x Stickers Note: To work properly, the following 3 conditions must be met: 1. GPS positioning is successful. 2. The compass can only work properly when the vehicle is in motion. 3. When driving, the compass direction is the direction the car is traveling. The working voltage of this product is 5V, and it is forbidden to use a voltage higher than 5V for power supply