1. BUILT IN GRADIENT METER: Car HUD meter has a built in incline meter that monitors the left and right tilt of the vehicle in real time. Intelligent slope system for stable driving. 2. HIGH SENSITIVITY: Car HUD display is highly sensitive and the climbing and descending angles use rotation, which is suitable for self driving and off road activities. 3. REAL TIME POSITIONING: Car slope meter can locate multiple satellites in real time based on location and provide data such as altitude, latitude and longitude coordinates. 4. BUILT IN LIGHT SENSOR SYSTEM: Car HUD meter has a built in light sensing system that automatically adjusts the screen brightness according to the current ambient light. 5. PROVIDE SAFE DRIVING: Car speedometer supports real time monitoring of vehicle data, so there is no need to keep your head down while driving for the sake of driving safety. Spec: Item Type: Car HUD Display Material: ABS Power Supply DC 10V-30V Operating Temperature -40°C To +80°C) Voltage Measurement Range DC 10V-30V Pitch And Roll Angle -40°To +40° Voltage Measurement Accuracy +0.3V Speed Accuracy GPS Cold Start Time 32s (Average) GPS Data Refresh Speed 1s GPS Hot Start Time 1s (Average) GPS Wireless Transmission Frequency 2.4GHz packing list: 1 x Display 1 x Cigarette Lighter 1 x Wiring 2 x Accessory