"The GoldenRod GunSaver Dehumidifier is designed to handle humidity from the interior of your safe locker or cabinet and protects against rust by generating a low level of heat that removes moisture from the air. Comes with mounting brackets for easy installation. All GoldenRod GunSafe Dehumidifiers come with a detachable plug for easier mounting. This model features a six foot power cord and must be mounted horizontally at the bottom of an enclosure to work properly. UL listed.