Description: With 2 built-in magnets in measuring surface, which is convenient to be attached to the object measuring workpiece. Power-off automatically in 5 minutes. Light weight and durable. Portable size, convenient to with other measuring tools and enlarge measuring range. Relative/absolute measurement interchange at any position. More widely application is in wood processing industry (especially in furniture manufacturing industry) for wood angle accurate cutting; auto repair industry for tiring assembling angle accurate controlling; in machining industry for machine tool working angle accurate positioning,and large vehicle arm rotation angle etc.. Specification: Size: 57x57x30.5mm / 2.24x2.24x1.2 inch Measuring range: 360 Degree Resolution: 0.05 Degree Accuracy: 0.2 Degree Repeatability: 0.1 Degree Battery: 2 x AAA 9V batteries (not included) Working temperature: 0-40 Degrees Absolute zero measurement based on the horizontal surface Net weight:0.21kgs Operating Instructions: 1. Press the "ON/OFF" button, it turns on, and the LCD displays absolute horizontal angle. Press "ON/OFF"button again, it turn off. 2. Measurement initially displays 0.0 on the LCD at the beginning, when it displays"on the left side ""on the right side, it means the left side is higher and right side lower; when it displays"" on the left side ""on the right side, it means the left side is lower and right side higher. 3. Put the instrument on the horizontal stand, and press the "ZERO" button, the value returns to zero, and the read-out is the angle value measured angle value relatively to the horizontal stand. 4. Press the "HOLD" button, the value on the screen will be locked. 5. The magnets at the bottom allow the instrument to be attached onto iron material measurement object. Press the "ZERO" button; reset the value to proceed relative measurement. Package Includes: 1x Inclinometer 1x User Manual