Usage Tips:[MULTI-FUNCTIONS] Add Statistics of total mileage,This GPS speedometer HUD not only displays the vehicle's driving speed in time, but also displays the driving direction by compass, Single Driving Time, Single Driving mileage, Let you know the key information for your trip. [TIMELY AND ACCURATE ]Speed and compass data is from satellite, timely and accurate.In particular, the direction of the compass is driving speed, not affected by the magnetic field. [MORE SAFETY]1. The shell is made of high temperature material, which not deform at 80 Celsius for 3 hours. 2. No built-in battery, no explosion at high temperature. [BIG AND GREEN COLOR FONTS] big screen size display make more easily and comfortable to read. Big and green color fonts, green light let the driver more compfortable and protect the drivers' eyes, specially for long distance driving. [ALARM FUNCTION] Over-speed Alarm and fatigue driving alarm to your safe trip. Default setting is 120KM/H or 120MPH. You can adjust it according to your needs. When the product detects speeding, it beep to remind the driver. Colour:black Material: ABS+PC Package Contents: 1X host 1X car charger cable 1X bracket 1X English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.