Precise Angle Gauge with ScaleThe digital level with scale supports measuring range of 4 90 (0-360), accuracy of 0.1 at 0 and 90; 0.2 at other angles. Displays angle and bevel readings in /% / mm/m / IN/FT. With reading hold function, it is convenient to record by this digital level inclinometer bevel box. LED Display with Buzzer Featuring LED technology for display The brighter, this protractor angle gauge is easier and clearer to read the values even at night. The display value automatically reverses when the electronic level is upside down. In addition, routing the acoustic signal via beeps when you have reached 0 or 90+/-1. Absolute and Relative Measurement This angle finder supports measurement absolute angle to test if the work surface is level to check roof slopes, wheel alignment, etc. Additionally, this protractor allows you to check the relative angles between surfaces. Magnetic V-Groove Base The V-groove base with strong magnets allows secure attachment to a curve or cylindrical magnetic surfaces such as pipe or metal shafts. And the sturdy, durable aluminum frame for precision leveling measurement.