Features:SAFETY ALARM: Precisely show vehicle pitch angle and tilt angle change.Overspeed alarm: When you exceed the speed limit, the alarm also alerts to insure your safety.HD LCD DISPLAY: All three dials are on the plane, which is clear at a glance.Main Function: Supports monitoring of vehicle tilt angle and pitch angle change, driving speed, compasses, satellites time, altitude and coordinates.Application: Widely applicable to van, trucks, buses, cars, SUV, and other vehicles.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: ABS.Size: 12.7 x 2.5 x 6.Working Temperature: -40-80.Roll Angle: -40-40Pitch Angle: -40-40Voltage Measuring Range: DC 10V-30V.Voltage Measuring Accuracy: 0.5V.Speed Accuracy: 0.36Km/hWireless Transmission Frequency: 2.4GHz