Pocket-Sized Only 4" tall; Four Measuring Reference Points - Back, front, swingout extension pin for measuring from inside corners or channels, or center of optional tripod; Three Measurement Systems — Feet and inches, decimal feet, and metric; Length, Area and Volume Measuring Capability —; Continuous Measurement Mode — Measurement automatically adjusts when walking-off distances; Continuous Laser Mode — Reduces the number of key strokes when making rapid sequence of measurements; Indirect Length Measurement Mode — Calculates inaccessible distances that cannot be measured directly due to obstruction or lack of reflecting surface using Pythagorean theorem (a2 + b2= c2); Ergonomic Soft-Grip Area — For sure grip and comfort