measures from 2" to 115' (0.05 to 35m) laser measurement accurate to 0.08 inches at 32 feet historical storage recalls the previous 10 records (measurements or calculated results) automatically calculates area and volume indirect measurement using pythagorean theorem continuous measurement function with min/max distance tracking updates every 5 seconds addition/subtraction, front or rear edge reference low battery indicator, auto power off complete with carrying case and 2 aaa batteries

specifications
measurement range	2" to 115' (0.5 to 35m)
accuracy (up to 32’/10m)	±0.08” (±2mm)
resolution	0.001" (0.001m)
length add calculation	99'11" (99.99m)
area calculation	999.99 sq. ft. (999.99m2)
volume calculation	999.99 cu. ft. (999.99m3)
laser power off	after 30 seconds
auto power off	after 3 minutes
power supply	2 aaa batteries

extech dt300

specifications
measurement range	2" to 164' (0.5 to 50m)
accuracy (up to 32’/10m)	±0.06” (±1.5mm)
resolution	0.001" (0.001m)
length add calculation	99'11" (99.99m)
area calculation	999.99 sq. ft. (999.99m2)
volume calculation	999.99 cu. ft. (999.99m3)
laser power off	after 30 seconds
power supply	2 aaa batteries

included accessories
	2 - aaa batteries 1 - carrying case

本产品的品牌是extech，型号是DT200