"The Rotary Laser Level features self-leveling in the horizontal plane and manual-leveling in the vertical plane with 90 split beam. Range scan modes include dot and two adjustable line lengths. Visual and audible alarms when beyond leveling range. Rotation Speed 150, 200, 250, 300 rpm variable, Case Type Hard shell case, Accuracy 1/8 in. per 100 ft., IP Protection Class IP 66, Laser Beam Color Red, Visual or Audible Indicator Both, Material Type Rugged housing, Vertical Leveling Yes, Scanning Modes qty. 3 0, 30, 60, Class Rating Class IIIa, Beam Type 90 split beam, Working Temperature 32F to 104F, Tripod Mount Dimensions in. 5/8 in.-11 center screw thread, Dimensions L x W x H in. 7 1/16 x 6 3/8 x 7 61/64, Self Leveling Range 3.5, Interior Range ft. Up to 200, Exterior Range ft. Up to 2,000, Single, Pair, or Set Set, Battery Included Rechargeable battery pack and 6V adapter, Battery Type Rechargeable battery pack, 6V adapter or C batteries, Leveling Type Self pendulum, Laser Output 5mW, Horizontal Leveling Yes, Battery Life Approx. 15 hrs. of continuous use, Laser Wavelength 635nm10nm. Locking mechanism protects inner pendulum during transit"