à¤Ã×èͧÇÑ´ÃÐÂÐ DT300 DT300: Laser Distance Meter Laser Distance Meter à¤Ã×èèͧÇÑ´ÃÐÂРẺáʧàÅà«ÍÃì DT300: Laser Distance Meter à¤Ã×èͧÇÑ´ÃÐÂÐ MAX 50m , Measures from 2" to 164' (0.5 to 50m) Laser measurement accurate to 0.06 inches at 32 feet Features: Measures from 2" to 164' (0.5 to 50m) Historical Storage recalls the previous 20 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 For complete specs please download the product datasheet (not available for some accessories) Click to see explanation Click to see explanation Distance Meter DT300 Extech à¤Ã×èͧÁ×ÍÇÑ´ÃÐÂÐ à¤Ã×èͧÇÑ´¾×é¹·Õè ẺàÅà«ÍÃì