Bosch GTL 3 Laser Level, 635nm Laser wavelength, Levelling Accuracy: ±0.2mm/m, Working Environment: Indoor, Laser Class: Class 2, Laser Colour: Red, Power Source: Battery, Dimensions: 6.125 x 4 x 3.875in, Weight: 499g, Length: 6.125in, Maximum Operating Temperature: +50°C, Minimum Operating Temperature: -10°C, Width: 4in, MPN: 0601015200