The Porter Cable RT-5250-1 Rotary Laser Self Level is a precise and reliable tool for laser leveling tasks. This model from Porter Cable is designed for professional use in various industrial and construction applications. The unit comes with a case for convenient storage and transportation, making it a practical choice for fieldwork and on-site measurements. The self-leveling feature ensures accurate results, making it a valuable asset for those in need of precise measurements and inspections. I do not know how to operate it properly but I was assured that it does work properly. The video shows me attempting to use it.