The age-old problem of unwanted moisture damaging expensive guns while stored in safes and cabinets has been resolved by circulating warm air and removes humidity from gun safes and cabinets. Eliminates moisture, prevents rust, and preserves the life of your guns. Easily plugs into any 110-120 volt U.S. household current. Simply install, plug it in, and forget about it. Removes humidity from safes and cabinets up to 300 cubic feet.