|1. 360 degree digital measure range
2. Display always reads upright, no matter which way the level is turned
3. Alternative reference (zero)
4. Readout holding
5. Degree/Slope, Absolute measurement /Relative measurement conversion
6. One measuring plane:The bottom is stainless steel plane and have a screw in the center.
7. One thumb screw: install the module to your frame by screwing the thumb screw on the bottom.