1. [Products]: G18 HUD Head-up Display has Dual data for GPS and Compass, Plug and Play, Digital Speedometer Provides Cars with Colorful Ambient Lighting to Create a Driving Atmosphere 2. [Screen Display]: The Head-up Display is Fully Automatic Light-sensitive, No need to Manually Adjust, Adaptive Adjustment of Brightness, Clear enough in the Daytime, Not Blinding at Night 3. [Supplementary Note]: GPS Speedometer Comes with GPS+BeiDou Global Positioning System, Built-in GPS and BeiDou Chip Module, Which Makes Up for the Lack of A Single Digital GPS speedometer 4. [Product Features]: G18 is equipped with overspeed alarm, fatigue driving reminder, left/right tilt reminder, front/back tilt reminder. A variety of alarm functions to enhance driving and worry- driving. Intelligent Gradient Meter with Free Rotation to Improve Driving Sensitivity, Real-time Monitoring of the Cross-roll Angle and Pitch Angle, Beyond the Dangerous Value with Alarm Prompts to Ensure Driving Safety 5. [Installation Instructions]: This HUD easy Installment. Tpcy-c Interface is More Convenient, Non-destructive Installation, Plug and Play Provided. Turns Off Automatically as the Car Stops