Happyfun Digital Angle Finder, Angle Gauge Electronic Level Tool with 4-Sided Strong Magnetic Electronic Level  (0 inch)

4-Sided Strong Magnetic Upgraded This Digital Level Box comes with Not only the baseboard, but also the stronger magnetic upgrade at the four sides for more convenient operation. Never slide on the table saw blade or any metal surface. A great helper in woodworking, construction, machinery, telecommunications, automobile etc. Larger Backlit LCD Display This digital protractorfeatures with a larger LCD backlight display, which enable you to see the data more clearly even in darkness. Tells ERROR in an incorrect position (e.g. tilts diagonally over 30 degree), to make sure getting the accurate measurement. User Friendly Design With data hold, backlight, low battery indicator, automatic shutdown without operation after 15 minutes,maximum and minimum functions, and angle and slope readout conversion. What's more, you can change your battery with one simple push, no screwdriver needed and no need to worry about losing the screw anymore! What's in the box 1 x Calibration Tools