The Leica Disto D2 laser distance measurer has a long range and a small margin of error. This device has a range of up to 100 meters, and it has a margin of error of only 1.5 millimeters. It can remember the last ten values it recorded, for your convenience, and it requires two AAA batteries to function. Each set of batteries can supply roughly 10,000 measurements, and the backlit display is bright and highly visible.