Multi-functional Measurement, used for measuring length, inside-outside and reverse angles of objects. Material: Carbon fiber + ABS, Measuring Length: 0-200mm; Measure Angle: 360 Degree; Accuracy 0.5 LCD Display Locking Knob Design, Convenient to lock the angle at any position for accurate measurement, easy to read. Come with CR2032 3V Lithium Battery Power Supply, 5 minutes automatic power-off function, can work more than 2000 hours. Ruler Protractor Combination, Ideal measuring tool for woodworking, construction, sketching, drawing, Crown molding, baseboard molding and more. Specification: color: as show Material: Carbon Fiber + ABS Folded Length: 200mm Overall Length: 400mm Measure Angle: 0-360 degrees Resolution: 0.05 degree Accuracy: +/- 0.3 degree Battery: 3V CR2032 Automatically Closed Screen Time: 5 min Package Included: 1 X Digital Angle Ruler