Multifunction Speedometer: Displays the speedometer, clock, number of satellites, direction of travel and other information in your driving view. You can safely view driving information without taking your eyes off the front, allowing you to relax and focus on driving operations more safely. Abnormal Alarm Function: Additional instrumentation with speeding and fatigue driving alarms make your driving safer and more comfortable. With Compass - Features a GPS navigation direction compass to help drivers by indicating directions. Equipped with a light sensor that adjusts its brightness according to different light, it is very clear in bright light, providing a safer day and night driving experience. Compatible Models: All models. Simply attach the GPS meter to the dashboard and install it in less than 1 minute without tools. Any compatible model can be easily installed.