It has a large, back lit screen with large readout making it easy to read in any environment. With an impact-resistant, IP54 rated housing with shock-absorbent soft-grip casing. The laser delivers quick measurement results and assists in daily work, e.g. calculating how much material is needed. Specification: Accuracy: ±3.0mm. Operating Range: 0.2-30m. Power: 2 x AAA batteries (supplied). Protection Class: IP54 (dust & water splash). Laser Class: 2. Laser wavelength: 635nm.