The G40 40m Portable Laser Distance Measurer not only measures distance up to 40 meters with an accuracy of plus or minus 2mm， it also calculates area， volume and the Pythagorean theorem. Its continuous measurement and data storage functions allow users to quickly calculate without the need for a separate calculator or manual math. This distance measurer is very easy to use with one-push button and a clear， large digital display screen. Hence， it is ideal for electricians， contractors， masons， remodelers， painters， architects， inspectors， and builders for residential and commercial design and construction projects. Don’t hesitate to get one! It will surely become your great helper!                                    Features            Measure distance up to 40 meters with an accuracy of plus or minus 2mmCalculate area， volume and the Pythagorean theoremContinuous measurement and data storage functionsEasy to use with one-push button and a clear， large digital display screenIdeal for electricians， contractors， masons， remodelers， painters， architects， inspectors， and buildersSuitable for residential and commercial design and construction projects                                                             Specifications             Color     Red， Black    <br> Measuring Accuracy     ±2mm    <br> Display Accuracy     1mm    <br> Measuring Range     0.05~40m(Built-in Angle Measurement)    <br> Model     G40    <br> Measurement Unit Options     M/mm/in    <br> Laser Classification     Class 2M II    <br> Laser Type     620-690nm，＜1mW    <br> Continuous Measurement Function     Yes    <br> Area Measurement Function     Yes    <br> Volume Measurement Function     Yes    <br> Indirect Measurement Function     Yes    <br> Pythagorean Proposition Measurement Function     Yes    <br> Plus-minus Method     Yes    <br> Minimum/maximum Measurement     Yes    <br> Display Illumination     Yes    <br> Show Beep     Yes    <br> Protection Against Splashes and Dust     IP54    <br> Historical Storage     10    <br> Temperature Range for Operation     0℃~+40℃    <br> Temperature Range for Storage     -20℃~+70℃    <br> Battery Life     5000~8000 Measurements    <br> Battery Selection     Lr6(AA)2 x 1.5 V    <br> Laser Switch-off Automatically     After 30 Seconds    <br> Instrument Switch-off Automatically     After 3 Minutes    <br> Dimensions     (4.41 x 1.77 x 1.02)" / (11.2 x 4.5 x 2.6)cm (L x W x H)    <br> Weight     3.49 oz / 99 g     <br>                                                             Package Includes            1 x Instrument<br>1 x Hand Strap<br>1 x Operation Instruction<br>1 x Protection Package<br>1 x Warranty Card<br>2 x Batteries<br>