This air purifier is designed for large rooms up to 600 sq. ft and features a True HEPA air filter with a fragrance sponge. It has 6 timers and a quiet air cleaner. It can detect and display PM2.5 levels in real-time. Price drops from $99.99 to $30 when you apply the coupon code "70A7REFK" at checkout. Shipping is free with Prime or on orders over $35.