Description:  Portable 360 Degree Magnetic Smart Digital Level Inclinometer Protractor Measurement Tool.     Features:  Fitting roof beams at the desired angle.  Measuring or setting the pitch of drainage pipes.  Setting or checking the angle of disabled access ramps.  Setting or checking the grading of ground or roads for drainage.     Specification:  Automatic Power-off Function : When the instrument is on, it will automatically power off after the period of 120 seconds during which no button is pressed orthe change of angle iskept to be equal to or less than 0.1degree.  Stand-by Time : Around 700 days. (The batteryshall be taken out for storage if the instrument will be kept idle for a long time period) Measurement range: With magnet at the bottom, 0 - 90 degrees/ quadrant x 4 quadrants, that is, 360 degrees.  Display resolution: 0.10degree.  Precision: The precision of measurement is lessthan 0.1degree. Under the condition that the temperature error band within the operating temperature range (that is, the temperature drift) is less than 0.05 degree, the long term temperature drift is kept below 0.1degree and the repetitive error below 0.07degree.  Automated Voice Implication: 0-degree, 90-degree and 180-degree.  Battery: 9V battery ( Included ).  Operating temperature range: -10℃ - 60℃.  Storage temperature range: -20℃ - 80℃.  Operating humidity range: < 90%RH.  Outside dimension (MM): 160 x 52.5 x 21.5 (length X width X thickness).  Dimension of the display: 71.5 x 23.5 (length x width).     Package includes:  1 x 360 Degree Digital Level Inclinometer Protractor