Features:_x005F_x000D_ 1. Professionally measure the inner and outer angles and angles of objects_x005F_x000D_ 2.0-360 complete measurement._x005F_x000D_ 3.Easy to lock at any angle, compact, accurate measurement, easy to read._x005F_x000D_ 4. With a locking knob, convenient to lock the angle at any position._x005F_x000D_ 5. 5 minutes automatically shut down, induction automatically boot._x005F_x000D_ 6.Button function: open key, clear key, data hold button, degree and degree conversion button_x005F_x000D_ Material:Carbon fiber + ABS._x005F_x000D_ Color:Black+Red,Transparent+Red._x005F_x000D_ Specifications: 0-200mm,0-300mm._x005F_x000D_ Size:_x005F_x000D_ 0-200mm:about 220mm;_x005F_x000D_ 0-300mm:about 317mm._x005F_x000D_ Measuring range: 0-360 _x005F_x000D_ Resolution: 0.1 _x005F_x000D_ Accuracy: 0.3 _x005F_x000D_ Working power: 3V_x005F_x000D_ Power: 1 * 3V CR2032 battery within or without battery optional_x005F_x000D_ Operation time: 5,000 hours_x005F_x000D_ Operating temperature: 0 C - +50 C_x005F_x000D_ Working humidity: 85%_x005F_x000D_ Automatic closed screen time: 6min_x005F_x000D_ Usages: Measurement of angle and length_x005F_x000D_ Packing includes:_x005F_x000D_ 1* 2-in-1 Digital Angle Ruler._x005F_x000D_