Product Description: Smart Car Digital Speedometer (Head-Up Display) System - Hassle-Free Plug & Play Operation - User-Friendly Control Interface - Compact Dashboard/Console Mount - Digital Multicolor.LCD display shows speed, distance, travel time, voltage and more - GPS Navigation Direction Compass. Automatic synchronization with engine ignition, power on/off - unique acceleration and braking test functions.USB Cable Powered - Universal Vehicle Compatibility Car, Truck, Van, Trailer...Features: Name: Digital Speedometer Model: G4 Material: ABS+PC Screen Type: LED Applicable models: Universal Appearance size: 5.2*5.2*1.4cm/2*2*0.5inchProduct List: Digital Speedometer*1 USB cable*1 Double-sided tape*1 Suction cup holder*1See more product details 1.6 Colors of LED Lights: The head-up display of vehicle speed has 6 colors of LEDs to display, the unused colors represent different vehicle speeds, and red is a reminder alarm. 2.Abundant Content: Almost everything you might need to read while driving will be displayed through this HUD, including vehicle speed, driving direction, voltage, speed alert, satellites and number waiting, it is definitely a good driving partner for you. 3.High-definition Display: The screen of the digital speedometer is 2.2 inches high-definition display, small and exquisite. The HD LCD display is clearer and more intuitive. 4.Simple Installation: The speed head-up display does not require complicated installation, only simple operation, you only need to plug in the data cable that comes with it to connect to the display. 5.Convenient Start/Off Function: The vehicle speed head-up display has a very convenient automatic switch function. This function is carried out with the start and stop of the car, which can effectively protect the car battery.