Description: You can easily install this plug play head up display without damage the original car accessories. The head-up display has a variety of functions, including vehicle speed, compass, number of satellites, single mileage, speeding alarm, fatigue reminder in time, automatic light sensitivity and kilometer switching, etc. It is made of high quality plastic and electronic component material, which is durable. The length of the meter is 6.17cm, the width is 6.38cm, the height is 4.7cm. It is suitable for car, truck, van, SUV, ATV and so on. Item Name: Head Up Display Material: Plastic,Electronic Component Shell Color: Black Display Size: 2.1-Inch Display Light Color: White Light, Green Light (Optional) Function: Speed, Single Mileage, Driving Direction Alarm: Speeding Alarm, Fatigue Driving Reminding Alarm Supported Languages: Simplified Chinese, Traditional Chinese, English Size Details: 6.17cm x 6.38cm x 4.7cm/2.43" x 2.51" x 1.85" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Our data is obtained through satellites. Because the speed display is GPS/Beidou display, it can only be used normally in the case of satellite signals., and it is generally not displayed in the tunnel; it is also affected by densely-stored places; there may be an error of 1-2KM in the starting phase and the acceleration phase. Package Includes: 1 X Head Up Display 1 X USB Cable 1 x Anti-slip Mat 1 X User Manual