Accurate Measurement: Class II infrared rangefinder (MAX OUTPUT<1mW, λ=620-690nm) with ±1/16 inch accuracy. Upgraded dual-tube structure reduces temperature error; dual bubble levels ensure horizontal measurements. Multi Function: Measures area, distance, volume, continuous measurement, Pythagorean methods. Addition/subtraction mode for effective calculations; records max/min values in continuous mode. Wide Application: Completes most measurements in 0.5 seconds, ideal for house, room, backyard, construction site. Suitable for carpenters, realtors, landscapers, painters. Portable & Durable: Lightweight, fits in toolbox/pocket. IP54 water-splash resistant, made of ABS material. Color as shown in the picture. Specification: Material: ABS; Measuring range: 40/60/80/100M (optional); Measurement accuracy: ±2mm; Temperature range: -20-40℃; Battery: 2 x AAA batteries (not included). Packing list: 1 x Rangefinder, 1 x Lanyard, 1 x Manual