Magnetically attached to the measuring surface, which can be attached to the workpiece under test Relative measurement and absolute measurement conversion Angle and slope conversion Data locked for easy reading Portable size, easy to use with other measuring tools to expand the measuring range Measuring range: 4 x 90 degree2 x 180 degree Accuracy: ±0.2 degree Repeatability: 0.1 degree Working temperature: 0Celsius~40Celsius application: 1. Wood processing: precision cutting of wood corners 2.Automobile repair industry: precise control of tire assembly angle 3 Processing: precise positioning of the working angle of the machine tool, rotation angle of the boom Easy to carry. Fast response to measured values Backlit LCD display. Two AAA dry batteries (the product does not carry batteries) Multi-purpose measuring tool, three-in-one protractor, inclinometer and spirit level There is a magnet at the bottom, which can be attached to the object to be measured. Colour:black Material:plastic Size:60 x 30 x 55mm Package Contents: 4 x Electronic Protractor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.