wetols laser distance meters, 196ft m/in/ft laser measure with electronic angle sensor and mute function, backlit lcd, for pythagorean, distance, area and volume measuring, we-183 wetols <b>technical parameters:</b><br>special features: electronic angle sensor<br> measuring range: 0.15ft-196ft<br> measurement accuracy: ± 2mm<br> angle range: ±90°<br> distance unit: m, ft, in<br> max storage: 20 sets<br> display style: backlit lcd<br> laser type: 620~690nm<br> laser level: ii, <1mw<br> single measurement time: 0.25s<br> type of battery: 2 x 1.5v aaa<br> auto laser off: 30s & auto shutdown: 180s<br> operating temperature: 0~40°c<br> storage temperature: -20~65°c<br> weight (without battery): 50g<br> dimension: 3.7 x 1.6 x 1 inch<br>