ROTARY LASER LEVEL: This Johnson Self Leveling Kit is ideal for one-person application in various indoor and outdoor jobs. Perfect for small jobsites; this rotary tool self-levels in the horizontal plane and levels manually in the vertical plane. SAFETY ALARM: The rotary laser features visual and audible alarms that alert you when the rotary is beyond its leveling range and the locking pendulum that protects the inner pendulum during transportation. APPLICATIONS: This rotary laser may be used to check cut and fill; set foundations and footings; concrete pours; septic tanks and basement excavations; acoustical ceiling and drywall; align and plumb walls; level deck floors; set drainage; terracing; and more. 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: The kit includes a Laser with 800' working diameter; NiMH rechargeable battery pack; 6V battery charger; detector with clamp and 9V battery; tripod; 13' grade rod; wall/ceiling mounting bracket; magnetic target; tinted glasses; and hard-shell carrying case. Locking compensator protects inner mechanisms 90° split beam for alignment work