Generic WY-A1 Universal GPS Speedometer with Over Speed Warning

Only the Speed, Simple & Safe, Always Keep Your Eyes on the Road! Not like other HUD, it does not display other data which is not important, such as Voltage, RPM etc. It only focuses on the speed and over speed alert(can close the alert voice), so that you always keep your eyes on the road, NOT interfered by other gauge factors Green Color Display, and Auto Adjust Brightness through Sensor for Day & Night-time Driving, Clear & Comfortable, Never Feel Tired on Your Eyes. Adjustable bracket lets you set the unit at a desired angle, and provide film to ensure more clearer. Powered by Car Charger, Plug and Play, Easy Operation! Just insert the car charger into cigarette lighter outlet, no any professional installation is required. You can easily set up the display method(MPH or KM/h), and over speed limit alert. Compatible with all Cars/Vehicle/truckers! It uses GPS technology, Unnecessary to use data from your car, compatible with all cars, vehicles and truckers. Important Note 1. It uses GPS technology to calculate the true speed. it might be a little different from your car's speedometer, due to aftermarket modifications such as sizes of tire and wheel or differential gearing. You can adjust the speed to your personal preference above the Vehicle Speedometer. 2. The environment may affect the accuracy of the speed, because GPS signal may be disturbed by some atmospheric reasons, such as weak signal under the trees, high buildings, mountains, tunnels, or interference from other signals... all GPS devices have similar problem. 3. It may has very slight fold over phenomenon because of windshield structure. Packing Contents: main unit, display film, cigarette lighter power adapter, adjustable bracket, manual