Magnetic adsorption on the measuring , can adhere to the measured workpiece Conversion between relative measurement and absolute measurement Angle and slope conversion Data locking for easy reading Portable size, easy to use with other measuring tools, expands measurement range Measurement range:4 * 90 Display resolution: 0.05 (Less than 100), 0.1 (100-180) Accuracy: 0.1 Repeatability:0.1 Working temperature: 0-50 Application: 1. Wood processing: cutting of wood corners 2. Automobile repair industry: precise control of tire assembly angle 3. Processing: precise positioning of machine tool working angle, rotation angle of boom. Convenient to carry. Fast response speed for measuring numerical values. Backlit LCD display. Power Supply:2 x AAA battery (Not included batteries) Reading value: 0.1 , measurement accuracy: 0.2 Multi purpose measuring tool, three in one protractor, inclinometer, and level ruler. There is a magnet at the bottom that can be attached to the object being measured. Color:Black Material:plastic Package Contents: 1 * Digital Protractor Level Gauge 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.