ROTATIONAL SPEEDS: This manual rotary laser with illuminated vertical vial supports variable rotational speeds of 200-600 RPM. A variable RPM allows the user to set the laser to the speed that provides the optimum visibility. PRODUCT SPECIFICATIONS: With the included wall/ceiling mount; 8-foot grade rod; detector and clamp; tinted glasses; magnetic ; elevating tripod and hard-shell carrying case; this leveling system will get your jobsite up and running.