The Golden Rod Dehumidifier 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. - Made in USA - Removes moisture from gun safe interior - Protects firearm investment - Guards against rust - Easy install quick plug attachment - Mounting brackets included - 110/120 volt AC - Lifetime Warranty