Features: Pitch angle: Real-time measurement of the vehicle pitch angle during driving, the range is -40°~ +40° between upside and downside. Roll angle: Real-time measurement of the vehicle roll angle during driving, the range is -40°~ +40° between left-side and right-side. Driving mode: driving mode and off-road mode can be. alarm prompts: When the pitch angle and roll angle of the vehicle exceeds the default alarm value, the device will issue a alarm 'beep'