Feature:1. Intelligent GPS horizontal speedometer, supports accurate monitoring of vehicle speed, vehicle tilt angle, vehicle pitch angle change, compass, time and vehicle battery voltage status to insure driving safety.2. Accurately display the vehicle tilt/pitch angle and send out clear notifications. When the angle exceeds 40, the alarm alerts to insure your safety. The elevations error is between 5100 meters/16.4328.1ft.3. After connected to power supply, there will be a backlight inside, convenient for you to see accurately at night or in the dark.4. After the vehicle is started, the odometer will automatically start, and after parking, the odometer will automatically enter sleep mode.5. With overspeed warning, and fatigue driving warning will sound after 4 hours of driving, which is practical to use.Specification:Item Type: Slope MeterMaterial: ABSColor: BlackProduct Instructions:1. Park the car on a level surface, stick the adhesive on the product, adjust and fix it in the vehicle for easy horizontal view.2. Before driving, connect the power supply and wait to receive the satellite GPS signal until the data shows normal.3. Long and hold the setting button and click the start button to adjust the electronic clock.4. Press and hold the start button, and click the setting button to adjust the time of the gauge.NOTICE: The device has KMH and PMH now, short press the button M can switch them. When the PMH lights, it's on PMH counting. When the PHM faded out, it's on KMP counting.The speed and altitude unit is in MPH and inch..Package List:1 x Slope Meter1 x Car Power Cord1 x DC Cable1 x Double-Sided Tape1 x ManualNote: