The Bosch GTL 3 Professional Tile Laser produces two laser lines at a 90° angle and another at 45° 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° angle) : +-0.2 mm/m. Working Range: 20m. Working Range with Target Plate: 20m. Laser Diode: 630 - 650nm. Laser Class: 2. Operating Temperature: -10°C - 50°C. Storage Temperature: -20°C - 70°C. 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.