Provides dehumidification for large spaces such as gun safes/vaults. Three different sizes (S/M/L) correspond to 150 L/400 L/600 L gun safes/vaults. HYPERCUBE has a hygrometer attached to it for instant humidity monitoring. Regardless of its size, HYPERCUBE can also be simply renewed by microwave or oven for repeatedly usage. Unlike other dehumidifier products on the market, HYPERCUBE uses 90% less plastic due to environmental considerations. If you have a collection of guns locked up in a safe, you should definitely try this bad boy.