NEW Multi-function Full LCD Instrument OBD+GPS Dual System Car OBD2 GPS HUD Head Up Smart Digital Speedometer with Tester Alarm Auto-match models, plug and playAccording to OBD or EUOBD,( the on-board auto-matic diagnosis system) plug and play. - Judgment method: Open and find the sticker under the hood.lf OBD2 CERTIFILE can be installed (as shown in Figure 1)Or check whether there is an automobile diagnosis port under the steering wheel (as shown in figure 2)(u.s. cars can be used after 2003 and most other cars after 2007.) Package Included: 1 x Head Up Display New upgrade P24OBD LCD instrumentMultifunctionalOBD+GPS+Inclinometer+Accelerometer A variety of interfaces- switch by yourselfNew interface design, larger fonts, clearer and smoother1, Go to language selection2, System selection3, Short pre the setting button to switch the interface4, Long pre the setting button to enter the setting interface Switch between multiple language The all-language function setting is easy to understand, and the full-vehicle data terminology Vehicle accelerometer G value table Simple and intuitive G value display The larger the G value, the stronger the acceleration and deceleration performance,the better of car power,and the stronger the cornering control. Profeional racing cars, million-dollar luxury cars, and performance cars area must! Longitudinal G value: acceleration G value and braking G value Vertical and horizontal G value: left and right turning G value - Electronic Inclinometer - Real-time monitoring of the vehicle's left and right inclination, climbing/descending angle,and providing vehicle body posture change information for riders outdoor cro-country,entering Tibet, and extreme croing to ensure driving safety! - Appearance angle: -40~40 M30 Description Function: 1: Speed Real Time Display.2: Driving direction Display(Compa).3: 2 lights Switchs.4: One-key switch between kilometers and miles.5: Overspeed alarm.6: Fatigue driving reminder.7: Satellite Time. Alarm functions Improve driving safety 1:Overspeed alarm:Alarm when the vehicle speed reaches the set default value of 150KM/H.(30- 250 setting)2:Fatigue driving: Reminder after continuous driving exceeds the default value of 4.0 hours.1-8h setting