The Bosch BLAZE One GLM165-10 165 ft. laser measure features auto square, which automatically calculates the square footage totals with the push of a button. The easy-to-read backlit display delivers outstanding visibility and usability. This laser distance measurer includes default real-time measuring, adjusting as you move closer to or farther from the target, just like a tape measure. The BLAZE One takes instant and reliable measurements up to 165 ft., to size up the job in seconds, with an accuracy up to +/- 1/16 in.