Feature: 1. Wide Application: Inteligent HUD display is universal for cars, trucks, off‑road vehicles, locomotives etc. Avoids the danger of drivers looking down at the dashboard. It ensures the safety of drivers. 2. Easy Reading: Color high‑definition LCD display, simple and convenient for data reading. Automatically adjust the screen brightness, the mileage is clearly visible. 3. High Accuracy Speedometer: GPS obtains data from satellites, high‑precision data such as altitude, latitude and longitude, time, compass, driving direction, etc., to meet your needs. 4. Multifunctional: Voltage measurement, speeding alarm, fatigue driving alarm (4 hours of continuous driving will alarm), test the rolling angle and tilt angle of the vehicle, etc. 5. Intelligent Escort: Fashion appearance design, premium ABS and metal material for maximum durability. Intelligent escort, driving without losing your way, safe and reliable. Specification: Item Type: Smart HUD Display Material: ABS+Metal Power Supply: DC10V-30V Voltage Measurement Range: DC10V-30V Working Temperature: -40℃-＋80° Voltage Measurement Accuracy: ±0.3V Pitch Angle: -40°-＋40° Speed Accuracy: