Decteam MN50 Laser Distance Meter 165Feet/50M Laser Measure with LCD Multiple Angle Distance Area Volume Measurement Modes Decteam MN50 Laser Distance Meter Specifications: Laser cla:Cla 2 The maximum measuring range:0.66~164ft/0. 2~50m Laser type:640-660nm, < 1mW Measuring accuracy:2.0mm / 1/16inch(D 10m) ; 2.0mm5x10-5x(D-10) / 1/16inch5x10- 5x(D-10)(D>10m) Historical memory:30 set Measure reference:Front/Rear Measuring units:m/ in/ ft Auto laser off:30 second Button:Soft rubber button Auto instrument off:180 second Battery type:2xAAA batteriesIf ship from China ,not included Package Content: 1 x Laser Distance Meter 1 x User Manual 2 x AAA Batteries(If ship from China ,not included) 1 x Portable Pouch Decteam MN50 Laser Distance Meter feature: 30 Groups of Data Storage Pre "Menu" button 6 times to activate the function, the symbol "Floppy Disk" appears in the function field on the display. Data of each measuring group will be automatically saved to the database, and the maximum is 30 groups. Note that changing the battery will not cause the lo of data, and will save the data at the last shutdown. Measuring Accuracy: 2.0mm / 1/16inch(D 10m) 2.0mm 5x10-5x(D-10) / 1/16inch5x10-5x(D-10)(D>10m D is the measured distance, for example, if the measured distance is 11m(11000mm), the measuring accuracy equals 2mm 5x(11000-10000)mm= 2.5mm Measurement mode: distance measurement, angle measurement, continuous measurement, area measurement, volume measurement, addition and subtraction functions (including addition and subtraction of distance, area and volume), Trigonometric functions measurement , Trigonometric functions measurement. Please be noted the detail : Measurement speed: The white wall time measured at 5 meters should be 0.5 seconds (indoor) 3000 measurements per measurement No buzzer sound 180S automatic shutdown without operation 15S automatic backlight off without operation Unit conversion (m/ft/in)