Snap Safe's Rechargeable Gun Safe Dehumidifier is an essential tool for maintaining a dry, rust-free environment in your gun safe, closet, pantry, or other enclosed spaces. This dehumidifier uses moisture-control crystals that change color from orange to green, signaling when it's time to recharge the unit. Simply plug the dehumidifier into a 110V electrical outlet to dry out the crystals until they return to their original orange color. With effective moisture absorption for areas up to 333 cubic feet, this dehumidifier helps protect your valuables from rust, mildew, and moisture damage, ensuring a safe and optimal storage environment.