X90 GPS Digital Speedometer Head Up Display Car Slope Meter Inclinometer MPH KM/H Car Compa Latitude Longitude Altitude Meter Specification: -Power: DC 10V~30V-Depreion&Elevation angle: -40 +40-Clock Error Value: < 1 minute-Voltage measurement accuracy: 0.5V-GPS Cold Boot Time: 32s (average)-GPS Data Refresh Time: 1s-Working Temperature: -40 ~ +80-Roll Angle:-40 +40-Voltage Measurement Range: DC5V~30V-Speed Accuracy: < 0.36Km/h-GPS Hot Boot Time: 1s (average)-Wirele Transmiion Frequency:2.4GHz-Product Size:170*68*60(mm) Feature: 1. Multifunction - Intelligent GPS multi-function HUD speedometer supports high-precision monitoring of vehicle speed, vehicle pitch angle, vehicle roll angle, compa, time, and vehicle battery voltage status, ensuring your driving safety.2. 3-in-1 Alarm System - Accurately displays the pitch and roll angle changes of the vehicle and sends a clear notification. When one or both angles exceed 40 degrees, negative or positive, the alarm will sound. Also cover the Overspeed and Fatigue Driving reminders.3. High-definition LCD Display - Adopt high-resolution color LCD display with a built-in light sensor that adjusts the brightne of the screen day and night. Free rotation, more sensitive. After turning on the power, there will be backlight inside, which will help you see the screen at night or in dark conditions.4. GPS Module - Equipped with a high-precision satellite GPS signal module. Automatically monitor vehicle driving conditions.