Spectra LP50 Laser Pointer, Five Beam Point Laser with Hard Case Automatic self-leveling and plumb assures accuracy and fast setup One person installation of walls, doors, ceiling track and other overhead fixtures without the need for a plumb-bob Fast, one person 90 Degree layout of rooms, walls, tile, carpet squares and fixtures Dust, water and shock-resistant for improved reliability LP50 ships complete in a hard case with mounting accessories and target Class 3A/3R Laser and &lt;5mW (less than 5 Milliwatts)