"Self-Leveling Rotary Laser Level can be used for installing cabinets and drop ceilings, and for accurately framing walls and concrete projects. A locking mechanism protects inner pendulum during transport. Visual and audible alarms when laser drifts beyond leveling range. Horizontal Leveling Yes, Exterior Range ft. Up to 800, Single, Pair, or Set Set, Laser Wavelength 635nm10nm, Indicator Type Visual, audible, Vertical Leveling Yes, Case Type Soft sided case, IP Protection Class 54, Accuracy 1/8 in. per 50 ft., Dimensions L x W x H in. 4 31/32 x 6 11/16 x 6 11/16, Battery Included Yes 4, Battery Life 20 hrs. of continuous use, Working Temperature 14F-113F, Laser Beam Color Red, Rotation Speed 200, 400, 600 rpm Variable, Battery Type AA, Interior Range ft. Up to 200, Visual or Audible Indicator Visible, audible, Class Rating Class IIIa, Beam Type Vertical laser plane w/90 split beam, Tripod Mount Dimensions in. 5/8-11 center screw thread, Leveling Type Self pendulum, Self Leveling Range 3, Laser Output 5mW."