Absorbs moisture from the air inside a vault or storage area to help preserve and protect your firearm collection. No Outlet or Power Needed Unlike dehumidifier rods, Lockdown Silica Gel does not require power to remove humidity from the air. Silica Gel can also be recharged to use again and again. Simply heat in the oven to recharge the particles. This durable vented can provides protection for up to 57 cubic feet.