Keep your small spaces odor-free and smelling great. Gradually releases lightly scented oils that actually eliminate odors and freshens all month long. No plugs, no batteries and no mess. Works wonders in bathrooms, closets and offices. Refill Twin PackIncludes two scent cartridges. Scent: Gain Original Physical Form: Liquid Application: Automatic Odor Control Capacity Volume: 7.5 mL.