The Lockdown Rechargeable Dehumidifier is a quick and easy method for moisture elimination. Water glass crystals absorb moisture, are odorless, non-toxic, and will not release moisture back into the air. The compact design fits perfectly in gun vaults, safes and gunlockers. The window indicator shows when the unit needs recharging, and an included charging chord recharges the unit in 12 hr. Protects up to 333 cu-ft, perfect for protecting your valuable firearms. Water glass crystals absorb more moisture, are odorless, non-toxic and will not release moisture back into the air Compact design fits nearly anywhere Indicator window shows when unit needs recharging Protects up to 333 cu-ft Includes charging cord and recharges in 12 hr