The Lockdown Golden Rod 18 inches Dehumidifier Rod works by slightly increasing the air temperature inside the gun safe or other enclosure. This allows the warm air to circulate throughout the safe on a continual basis, thus eliminating humidity, mildew, and condensation. All of which are dangerous to your expensive firearm collection. SPECS: 18 inch L, 110 to 120 volt AC plug, 6 foot cord, protects up to 200 cubic feet. Rod features attachable legs for placement and a cord with a quick plug attachment to allow for the cord to be run through the back of the safe and then plugged in. Protects your firearms all while fitting in the smaller, less usable areas of the safe.