Feature: *2-in-1 digital protractor combination: combination of ruler and protractor, easy to measure anything. With -engraved metric and imperial measurements as well as precise digital displays on the edge of the ruler, this protractor accurately measures angles and lengths and is for woodworking, construction or drawing. *Lightweight and with LCD Display: The folding protractor is made of high-strength nylon fiberglass material, which has good rigidity, abrasion resistance and no deformation. When you select the for Zero point, the protractor has a large, easy-to-read LCD display. You'll never have to guess or look up angles and lengths again. It is powered by a lithium battery and has an operating time of over hours. *High precision: The accuracy of this for 360° protractor is ±0.5 degrees. Measuring range: 0-for 360° Folded length: 200 mm Total length: 400 mm. It is a good choices for most projects and daily use, DIY projects, woodworking , decoration and organization. *for 360° Locking and Reversing: The woodworker edge ruler has a locking and reversing angle function. Place the protractor where you want to measure your next cut, lock it clockwise to mark it, and use the miter saw to make the cut. The screen has a data hold function by pressing the "HOLD" button to freeze movements and ensure accuracy. *3V button lithium battery: with automatic power-off function, saving power consumption and extending battery life Specification: Product name: Digital display angle ruler Product material: nylon fiberglass engineering material Product range: 0-for 360° (200mm) Battery type: 3V lithium battery for CR2032 Resolution: 0. 05°/3' Product packaging: color box packaging Accuracy: 0.5° Product weight: 78g (net weight)/112g (gross weight) Operating temperature: 0℃~50℃ Working humidity: