GPS Speedometer Extend Digital Display Vehicle Odometer Trip Meter Course Overspeed Alarm Features: Product size: 2.03*2.03*0.55in ColorGreen Product weight: 0.309lb Screen size: 2.2inch Function: vehicle speed/driving direction/number of stars Alarm: speeding alarm, fatigue driving reminder alarm Product 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 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 driving experience. Plug and Play :The Vehicle Smart HUD Display features a hassle free plug and play operation. Simply mount the HUD near the dashboard or use the 360 degree rotating suction cup bracket to mount it on the A-pillar. It is powered via the included lighter USB cable. Automatic synchronization of power on and off according to engine ignition. 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. Products include: 1xDigital GPS Speedometer 1xMicro USB 1xRotary Suction Cup Holder 1xNon-slip mat 1x Instructions