The horizontal Tiling/Flooring Laser Level generates two lines on the floor at 90 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. Application: Contractors, electricians, glazers, finish carpenters, Includes: Level, floor target, batteries, case, manual Leveling type: Manual Laser wavelength: 635nm Level range w/o detector: 100ft. Interior range: 30ft. depending on lighting conditions Power source: Two AA batteries (included) Accuracy: 1/4in. @ 60ft. Preset angle: 90 Number of beams: 2 Beam color: Red Laser Class: IIIa Max. output:5mW Dimensions: 6 1/8in. x 6 1/8in. x 15/16in. Operating temperature: 14 F to 113 F