Pure Air, Affordable Price: Our most popular air purifier series is back with an all-new smart model. Specially designed in California, the Core 200S can be controlled remotely, letting you set schedules, adjust fan speeds, and more, all from your smart phone. Genuine Replacement Filters: For the best performance and longest lifespan, use genuine Levoit replacement filters. Use the in-app feature to monitor your filter life. When it’s time for a fresh filter, search “Core 200S-RF”.