Features: 3D 12 lines for finer positioning, with self-leveling system, flexibility and stability. Self-leveling function can conquer small rugge place such as 3, over 3 the laser light will keep blinking to remind you to put it on a flat place. Leaning function, it can be applied in a leaning position like upstair building. With 7mm wall mounted distance, general for indoor and outdoor use. There is a rotation knob on the machine, which should be put in the middle, when all the laser lines are locked, to ensures the level machine can be used in leaning position. Two touching buttons design, one OUT/H button, one V button, the slashline, horizontal line and vertical line with a clear division.(OUT= slashline function) The button is wear resistant, with high sensitive to switch the line mode quickly, and with comfortable hand feeling. The tripod metal base provides stable support and it is shockproof, shatter-proof. 1/4 screw size for easy connection, and the leveling machine support 360 rotation after installed on the tripod base. Easy to carry with the case, providing quick and convenient mobility and storage. It is perfect for a variety of uses, including flooring, tile layout, paneling, wallpapering, stenciling, wainscoting, finish carpentry, wall stud layout and partition installation. Note: Please do not let the laser line shoot to your eyes directly.