The Bosch GTL 3 Professional Tile Laser produces two laser lines at a 90 degree angle and another at 45 degree for precise and fast alignment and laying of wall and floor tiles. It has a compact and lightweight design for optimum ease of use. Supplied with: 1 x Alignment Disc, 1 x Laser Target Plate, 4 x (AA) 1.5V LR6 Batteries and 1 x Protective Bag. Specifications: Accuracy (between 0-90 degree angle): ±0.2 mm/m.Working Range: 20m.Working Range with Target Plate: 20m.Laser Diode:630 - 650nm.Laser Class:2.Operating Temperature: -10 degreeC - 50 degreeC.Storage Temperature: -20 degreeC - 70 degreeC.Dust and Splash Protection: IP54.Power Supply: 4 x AA 1.5V LR6 (Supplied).Max. Operating Time: 18 hours in 2-line mode, 12 hours in 3-line mode.Weight: 0.44kg.