Johnson 7.25" x 8.75" Digital Angle Locator with Magnetic Base has a 2-button design, automatic LCD backlight, automatic digit inversion for overhead measurements, and angle display in degrees. The working range of angle measurement is 4 x 90 degrees. It is an ideal tool for woodworkers, astronomers, electricians, machinists, plumbers, and homeowners for all leveling projects such as hanging pictures and mirrors. It has a 1-year warranty.