The Eva-Dry Renewable Mini Dehumidifier uses advanced non-toxic crystallized desiccant technology to efficiently absorb 4 to 6 oz of moisture from the air without leaks or spills.Eva-Dry Renewable Mini DehumidifierNon-toxic crystallized desiccant technology4-6 oz moisture absorption capacityRechargeable design with 10-12 hour renewal cycleMoisture indicator beads change from orange to greenPerfect for safes and small enclosed spacesUp to 10 years of repeated useIdeal for protecting valuables in safes gun cabinets and other small spaces where moisture control is essential. Simply renew by plugging in for 10-12 hours when indicator beads turn green.