The Bosch Blaze Pro GLM165-40 165 Ft. Laser Measure is a fully featured yet simple-to-use tool. It provides an easy-to-read backlit display that illuminates the measurements, and it delivers distance, square footage, volume and indirect measuring functions. It has a 10-measurement storage capability. This measure has addition/subtraction functionality, so the user can add or subtract measurements. The Blaze Pro includes default real-time measurement mode, adjusting the measurement the closer to or further from the target the laser measure is. It has laser precision technology and real-time measurement mode, for instant and reliable measurements up to 165 Ft., to size up the job in seconds. It is accurate up to 1/16 In. It fits in any pocket for easy access. Class IIA laser product, <1mw power output, 635 nm.