***One horizontal and one vertical green beam laser line.
***Lock position to apply for tilt purpose, like staircase laying, unit projecting sloped laser lines. 
***Self-leveling, laser flashing indicating when beyond the range
***Connect with tripod through1/4″ screw thread if necessary
***Super useful tool for home remodeling like floor laying, tile laying, ceiling, picture hanging, staircase, doors and windows, painting, furniture installing, etc.