Product OverviewThe UNI-T LM40 is a classic, entry-level laser distance meter favored for its straightforward functionality and reliability in indoor construction, interior design, and DIY projects. Engineered to replace traditional measuring tapes, it provides a "point-and-shoot" solution for measuring distances up to 40 meters. Its robust, pocket-sized design and intuitive interface make it a staple for contractors and hobbyists who need rapid, precise measurements for area, volume, and indirect height calculations on the fly.Key FeaturesEssential Measurement Suite: Features a versatile set of tools, including single and continuous distance measurement, area and volume calculations, and Pythagorean theorem-based indirect height/width measurements.Millimeter Accuracy: Delivers consistent accuracy of ±2mm, suitable for indoor site surveying and residential planning.Compact & Ergonomic: Designed with a slim, easy-grip body that is lightweight, ideal for one-handed operation in tight spaces.High-Contrast Display: Equipped with a clear, backlit LCD screen that allows for easy reading in various lighting conditions, from bright rooms to dimly lit closets.Smart Power Management: Includes an auto-laser-off (30s) and auto-power-off (3 min) function to maximize the life of the standard AAA batteries during field use.Historical Data: Capable of storing up to 20 groups of historical measurement data for easy review and comparison while on the job.Technical SpecificationsFeatureSpecificationBrandUNI-TModelLM40Measuring Range0.05 – 40mAccuracy±2mmLaser Class2 (630–670nm, <1mW)Unitsm / ft / inData Storage20 GroupsDisplayLCD with BacklightPower Source2 x 1.5V (AAA) BatteriesDimensions122 x 52 x 29.5 mmWeightApprox. 100gSEO KeywordsUNI-T LM40, Laser Distance Meter, 40m Laser Rangefinder, Digital Measuring Tool, LM40 Specs, Precision Distance Measurement, Area and Volume Calculator, Construction Measuring Tool, Entry-level Laser Measure, Portable Distance Finder.