"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, Class Rating Class IIIa, Case Type Hard shell case, Accuracy 1/8 in. per 100 ft., IP Protection Class IP 66, Laser Beam Color Red, 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, Visual or Audible Indicator Both, Material Type Rugged housing, Vertical Leveling Yes, Scanning Modes qty. 3 0, 30, 60, Interior Range ft. Up to 200, Battery Life Approx. 15 hrs. of continuous use, Battery Type Rechargeable battery pack, 6V adapter or C batteries, Leveling Type Self pendulum, Battery Included Rechargeable battery pack and 6V adapter, Exterior Range ft. Up to 2,000, Single, Pair, or Set Set, Laser Output 5mW, Horizontal Leveling Yes, Laser Wavelength 635nm10nm. Locking mechanism protects inner pendulum during transit"