atolla Laser Measurement Tool is a Class II laser product with less than 1mW power output. Measuring range covers from 0.15 to 60m - Higher Accuracy- Applying 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 Modes- The 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 measuring in different scenarios - Practical and Advanced- Specially designed with a high-visibility backlit LCD, the tool has higher readability in dark conditions, with mute function available in quiet places and two bubble levels for the more accurate horizontal direction - Versatility- Up to 20 records can be saved and retrieved, four units can be switched freely from ft/m/in/ft+in and addition & subtraction mode helps you get the calculation results more effectively - Durable and Portable- The housing of this high-quality laser measurement tool is made of durable materials, which accounts for waterproof and dustproof features, applies a hand strap for holding and carrying it everywhere