GemRed LDM-100 Laser Measurer Distance Meter Range Finder 196-Feet HIGHT ACCURACY- Accuracy ups to 0.06 in; measuring distance ups to 196ft. Press UNIT to switch unit among M/In/Ft freely. LCD WITH BACKLIGHT & AUDIBLE INDICATOR-Large backlighted screen make a better reading in dim conditions. The beep indicates different measuring modes. MULTIPLE FEATURES-Incremental and subtractive measurement. Max and min value measurement. Area, volume, Pythagorean theorem calculation. 20 groups measurements memory. Optional reference point. Low battery indicator. DURABLE-IP54 water-proof and dust-proof level. Portable size, ABS&rubber body. PACKAGE-Storage pouch, battery, instruction. <span class="a-text-bold">Measuring range:</span> 0.05m~60m(0.16~196ft) <span class="a-text-bold">Accuracy: </span>1.5mm/(0.06 in) <span class="a-text-bold">Unit:</span> m,inch,feet <span class="a-text-bold">Laser grade:</span> II <span class="a-text-bold">laser type:</span> 635nm, &lt;1mW <span class="a-text-bold">Calculation fundtion:</span> volume, area calculation <span class="a-text-bold">Pythagorean theorem measurement:</span> Yes <span class="a-text-bold">Waterproof and dustproof grade:</span> IP54 <span class="a-text-bold">Backlight: </span>Yes <span class="a-text-bold">Working temperature:</span> -10C ~+50C (14F ~ 122F) <span class="a-text-bold">Storage temperature:</span> -25C ~ 70C(-13F ~ 158F) <span class="a-text-bold">Auto shut off:</span> 3 min <span class="a-text-bold">Weight:</span> 150g