Hello, nice to meet you! (^o^) Levoit Core 200S I've checked it over, and it seems unused. There's no sign of use, and the main unit and filter are in good condition. I think the filter is probably unused. I haven't connected it to a smartphone, so the usage time is unknown. Recommended for those who want a clean item but want to keep the price down ✨ I've only confirmed that it powers on. Air Purifier, Desktop Air Purifier, HEPA Filter, Virus Removal Compact, Sterilization, Deodorization, Pollen Compatible Air Purifier Levoit Core 200S [Achieves Four-Layer Purification, Air Purifier from America's #1 Brand] With its unique technology, the plasma and high-performance 3-layer filter removes 99.97% of viruses, filtering the air in stages to achieve double purification and fill your room with higher-quality air. Plasma inactivates bacteria and viruses in the air and deodorizes, while also providing effects such as static electricity suppression and skin moisturization. The H13 HEPA filter boasts a collection efficiency of 99.97% or more, with a dust collection area more than twice that of other companies, and can firmly remove fine particles down to 0.1μm, such as pollen, PM2.5, and house dust. Say goodbye to allergy symptoms such as nasal congestion and sneezing! The high-grade activated carbon filter dedicated to deodorization quickly breaks down odors such as tobacco, sweat, pet odors, and the musty smell of indoor-dried clothes. The pre-filter captures large debris such as hair, fibers, and dust, extending the life of the filter. Also, according to research by the Ministry of the Environment, people who are exposed to too much ultraviolet light are more likely to have unhealthy skin than ordinary people. It does not use UV light, which has a negative impact on the aging of human skin. With the patented VortexAir 3.0 technology, it strongly absorbs dirty air from all directions at 360°, and can quickly purify an 8-tatami mat room in just 15 minutes. You can enjoy clean air anytime. Furthermore, it is small and lightweight, making it easy to move, and children and women can easily carry it to any room they are concerned about with one hand. It supports rooms up to 18 tatami mats, and is useful in large spaces such as living rooms, kitchens, and offices, and is also perfect for one-room apartments and entrances! In addition, it is simple and refined in design, purifying air pollution while beautifully blending into the room as part of the interior. [Equipped with Pollen Mode, Easy Operation with Smartphone]