Precision Digital Inclinometer Electron Goniometers 4x90 Degree Magnetic Base Digital Protractor Angle Finder Bevel Box(Inclinationery) 1. Purpose: Measure tilt angle 2. Resolution: 0.1 degree 3. Measuring range: 4x90 degrees 4. Power supply: 1 AAA battery (not included) 5. Size: About 5.7x3 cm 6. Weight: About 70 grams Features: 1. 4 kinds of units can be switched, angle, slope, inft, mmm 2. Powerful adsorption magnet design, 360-degree comprehensive measurement, inclinationlevel test function 3. The screen automatically flips. When the instrument is placed upside down, the display screen will automatically flip and display, 360 measurement, convenient for viewing data Strong backlight 4. Convenient to view data, automatic shutdown after 1 minute of non-use, energy saving and power saving 5. It can be locked at any angle, and the HOLD key can hold measurement data at any angle