The horizontal Tiling/Flooring Laser Level generates two lines on the floor at 90deg angles for surface layout of tiles, stone, brick, carpet and hardwood flooring. Projects laser beams over wet mastic or concrete. Built-in protractor allows you to easily establish angles. Leveling Type: Manual, Class Rating: Class IIIa, Working Temperature: 14deg F to 113deg F, Laser Beam Color: Red, Visual or Audible Indicator: Visual, Accuracy: ±1/4 in. at 60ft., Laser Output: <=5mW, Case Included: Yes, Beam Type: Line, Interior Range (ft.): Up to 30, Battery Included: Yes, Laser Wavelength: 635nm +/-10nm, Beam (qty.): 2, Battery Life: Up to 30 hours, Battery Type: AA, Base Type: Standard, Dimensions L x W x H (in.): 6 1/8 x 6 1/8 x 1 15/16