Stanley TLM99 is the 100 ft./ 30Mtrs Laser Distance Measure which allows one person to take measurements without assistance. This tool measures up to 100 feet (30 meters) and provides accurate readings within +/- 3/32 inches (2 mm). Accuracy +/- 3/32Inch (2mm). Measures distance, calculates area and volume. Automatic calculations make job estimates quick and easy. Continuous measurement tracking function finds distance from a target quickly and easily.