In excellent used condition. Works perfectly, but the refills are expensive and so I no longer use it. The Aera Diffuser uses patented technology to give you the safest and most effective way to scent your home. Choose from dozens of fragrances designed by master perfumers and developed using only the cleanest of ingredients. For medium to large rooms. Fragrances last up to 800 hours. 5x longer than ordinary brands. Fragrances last up to 800 hours. 5x longer than ordinary brands. Fills a room evenly. No hot spots. Best for rooms up to 1,000 sq ft. Fills a room evenly. No hot spots. Best for rooms up to 1,000 sq ft. Set schedules in the Aera app to save money by scenting only when you’re home and awake. Set schedules in the Aera app to save money by scenting only when you’re home and awake. Safe for pets. Delivers a hypoallergenic scent experience. Safe for pets. Delivers a hypoallergenic scent experience.