Instantly shows level, true vertical, and any angle in between
Hold button freeze for convenient out of sight measurements
V-Groove on the top plate for accurate registration on curved or cylindrical surfaces and tapped 6-32 holes in base plate for special mounting
It can convert to different unit from degrees (°) to mm/m, to percent slope (%), to pitch (in/ft) plus it has backlight functions that allows you to read and work in the dark