Featuring a heat-resistant housing the Hornady® Rechargeable Dehumidifier from GunMag Warehouse is a versatile and easy-to-use dehumidifier designed to keep your gun safe and firearms dry and free of rust mildew and other moisture-related damages without the need for a safe-mounted power outlet. Moisture-control crystals change from orange to green when the unit needs recharging for quick noise- and odor-free visual notification. Simply recharge and dry out the crystals by plugging the unit into any 110V outlet until the crystals turn orange again indicating the unit is again ready for use and place it back in your gun safe. It's that simple! Plus this dehumidifier includes a quick-connect bracket for effortless mounting in gun safes closets and pantries.