Kestrel 3500 Weather Meter / Digital Psychrometer<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Rugged weather meter for weather enthusiasts， first responders， EMTs and professionals who need accurate environmental measurements with Night Vision back lighting </span></li><li><span class="a-list-item"> Get all the data you need to know your conditions， shift strategies， reduce risk and ensure safety; Night Vision-Preserving (NV) back light optional </span></li><li><span class="a-list-item"> Get all the data you need to know your conditions， shift strategies， reduce risk and ensure safety; Night Vision-Preserving (NV) back light optional </span></li><li><span class="a-list-item"> Protective overmolded case， replaceable impeller， large backlit LCD， waterproof， drop tested， accurate NIST-Traceable measurements， Night Vision-Preserving (NV) backlight optional </span></li><li><span class="a-list-item"> 4.8 x 1.9 x 1.1 in.， 3.6 oz.， includes replaceable CR2032 coin cell battery， lanyard; Made in USA and backed by a 5-year warranty </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41TYCtLFAGL.jpg" noproxy>