***One horizontal and one vertical laser line. 
***Lock position to apply for tilt purpose, like staircase laying, unit projecting sloped laser lines. 
***Self-leveling, laser flashing and sound indicating when beyond the range
***Connect with tripod through 1/4″ 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.