Bosch Laser Measure, 135 Feet GLM 40 VERSATILE: The Bosch GLM 40 Laser Measure includes multiple measurement capabilities such as area, distance, length, volume, continuous measurement, addition and subtraction. Measuring distance extends up to 135 feet. MEMORY: Conveniently stores up to 10 measurements to increase productivity. Real time laser measurements adjust as the user moves closer and farther away, just like a tape measure. VISIBILITY: The Bosch GLM 40 Laser Measure features a backlit screen for better visibility and resolution in dark work areas. ACCURACY: With Bosch Laser Technology, the GLM 40 measures to within +/-1/16 in. for extreme accuracy and precision. PORTABLE: With a pocket-size design and the square shape, the GLM 40 provides portability and ease-of-use. Its square shape allows you to measure in any direction from a flat surface. Class IIa laser product, 1mW power output