atolla Laser Measure Device, Laser Distance Meter up to 100m / ± 2mm Digital Measure Tool Range Finder with Bubble Level and Large LCD Backlit and Waterproof IP54Higher AccuracyApplying Class laser with output less than 1mW and featuring range up to 328ft 100m and accuracy of 2mm to meet your various needs, with a large optical lens, the laser can be calibrated in 7mm for measuring and responds within 0. 5s Multiple Measure ModesThe laser distance measure supports distance, area, volume, and Pythagorean modes, continuous measurement(max and min values), and two setting reference points(front and back) for