1. Pitch Angle: Real-Time Measurement Of The Vehicle Pitch Angle During Driving, The Range Is -40- +40 Between Upside And Downside. 2. Roll Angle: Real-Time Measurement Of The Vehicle Roll Angle During Driving, The Range Is -40- +40 Between Left-Side And Right-Side. 3. Vehicle Speed: Real-Time Monitoring Of The Current Speed Of The Vehicle. With Over Speed Alarm Function 4. Altitude: The Current Altitude Can Be Measured Of The Vehicle. 5. Safety Alarm Prompts: When The Pitch Angle And Roll Angle Of The Vehicle Exceeds The Default Alarm Value, The Device Issue a Safety Alarm Beep.6. Brightness Adjustment:This Gps Inclinometer Is Hd Lcd Display With High Resolution. You Can Adjust The Brightness According To Your Requriment. 7. Time Display:Display The Local Time. 8. Real-Time Voltage Monitoring:This Gps Inclinometer Can Avoid Safety Hazards Caused By Too High Or Too Low Voltage Prolonging The Lifespan Of The Battery. 9. High-Precision Satellite Positioning:Equipped With Compass. This Can Know Your Location At Any Time And Make Sure You Don't Go In The Wrong Direction. Perfect For Traveling And Driving Adventures. 10. Suitable For All Vehicles:Perfectly Compatible With , Trucks, Buses, Cars, Off-Road Vehicles, Suvs, And Other Vehicles. Plug & Play: Start With The Car And Turn Off With Car's Engine Off. Parameters: Power Supply: Dc10V-30V; Operating Temperature:-40C-+80C; Pitch Angle:-40-+40; Roll Angle:-40-+40; Voltage Measurement Range: Dc10V-30V; Voltage Measurement Accuracy: 0.5V; Speed Accuracy: Less than 0.36Km/h; Gps Data Refresh Rate:1s; Gps Hot Start:1s(); Wireless Transmission Frequency:2.4Ghz; Gps Cold Start:32s(); Accuracy: 2 Weight:230g; Size:127x25x60mm Plug And Play: Plug The Power Cable Into The Car Lighter Port; Connect The Power Cable Into The Data Port; Place The Device Horizontally In a Visible Position And Fix It With The Glue. Colour:black Material:plastic Package Contents: 1 * Smart Slope Meter Main Unit 1 * Lighter Power Cable Only the above package content, other products are not included. Note: Light reflection 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.