Features: 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 specification: Measuring range: 4 x 902 x 180 Display resolution: 0.01 Accuracy: 0.01 Repeatability: 0.01 Operating temperature: 0C~40C application: 1 Wood processing: precision cutting of wood corners. Architectural engineering. Level measurement 2 Auto repair industry: precise control of tire assembly angle three. Machining: precise positioning of the working angle of the machine tool, rotation angle of the 1. Easy to carry. 2. The measurement value has a fast response speed 3. Backlit LCD display. 4. 2 No. 7 AAA dry batteries (the product does not have batteries) 5. 4*90 measuring range 6. Reading value: 0.01, measurement accuracy: 0.01 7. Multi- measuring tool, three-in-one protractor, inclinometer and spirit level. : ABS+Aluminum colour: black Package Contents: 1 x Digital 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.