It has an additional triangular area function. The integrated inclinometer can be used as a digital level to calculate continuous height and indirect horizontal distances. Indirect height measurement uses Pythagoras to measure distances even when point A and/or point B isn’t accessible for linear measurement. The laser distance measure has a large 3-line backlit display which helps to improve screen visibility in both dim and bright conditions. It features a memory unit that stores last 20 measurements. A multifunctional end piece folds at 90 degrees for edge measurements and extends 180 degrees for measurements from corners. Durable design with overmoulded housing, which has been 6 ft (2m) drop tested, and is IP65 water/debris resistant. Specification: Accuracy: ±1mm. Operating Range: 100m (330ft). Power: 2 x 1.5V LR03 (AAA) ;batteries (supplied).