1Laser ranging, with high measurement accuracy, small error, it can be accurate to millimeters, measurement without contact, simple and efficient 2Complete functions, support digital storage, unit selection, measured temperature, low battery display, buzzer display, data display 3LCD large screen display, clear imaging effect is good, support data storage, convenient for reading and recording 4Made of high quality ABS material, light weight, convenient to carry, streamlined design, comfortable hand feeling 5Widely used in site survey and construction, it is a good helper for workers and improves work efficiency Item Type:RangefinderModel: UA40MMaterial: ABSPower Supply: 2 x 1.5V AAA(battery not included)Purpose: distance measurement Range 0.05m~40m Accuracy 2.0mm Distance Unit m,ft,in Area Unit ,ft,flat Laser Type 620~690nm LaserClass Level II, <1mW Single Measurement Time 0.25s Working Temperature 0~+40 Storage Temperature -20~+65 Single Measurement Maximum and Minimum Measurement Continuous Measurement Area/Volume/Pythagorean Theorem Calculation function Addition and Subtraction Function Unit Conversion Measurement Standard Selection Buzzer Prompt Historical Data Record Data Erasure Error Code Prompt Battery Voltage and Power display Horizontal Angle Display Self Calibration Laser Automatic Shutdown Instrument Automatic Shutdown