<b>Function:</b><br/>Precisely shows vehicle tilt angle with clear notification, when the angle is over 40 degree, alarm alerts.<br/>Precisely show vehicle pitch angle changes, when the angle is over 40 degree the alarm alerts to insure your safety.<br/>After connected to power supply, there will be backlight inside, which will help you see accurately in case of night or dark situation.<br/>Elevation error within 5-100 meters.<br/>After the vehicle starts the speedometer starts automatically， after car parking the meter will be in sleep mode automatically.<br/>Over speed alarm.<br/>Fatigue driving alarm alerts after driving for 4 hours.<br/><br/><br/><b>Product Parameters:</b><br/>Power: DC 10V-30V <br/>Working temperature: -40℃ ~ +80℃<br/>Depression＆elevation angle: -40℃ ~ +40℃<br/>Roll angle: -40℃ ~ +40℃<br/>Clock error value: ＜1minute<br/>Voltage measurement range: DC 5V ~ 30V<br/>Voltage measurement accuracy: 0.5V<br/>Speed accuracy: ＜ 0.36Km/h<br/>GPS Cold Boot Time: 32s (Average)<br/>GPS Hot Boot Time: 1s (Average)<br/>GPS Data Refresh Time: 1s<br/>Wireless Transmission frequency: 2.4GHz<br/>Product size: 70*59*59(mm)<br/>Weight: 203g<br/><br/><br/><b>Package Listing:</b><br/>1x Autool X90 Car Angle Slope Meter<br/>1x Cigarette lighter<br/>1x Fixed pad<br/>1x Instruction manual<br/>1x Packing box<br/><br/>