Self-levelling system. Horizontal and/or vertical line projection. Can project a perfectly right-angled cross onto the wall. Ideal for tiling, hanging pictures, etc. Tripod, max height: 117 cm. Laser class II, 635 nm. Accuracy: ± 0.5 mm/m. Battery: 2 x AA/LR6 (included). For indoor use. Comes with laser safety glasses, tripod and carrying case.