60 Hours Super-Long Runtime & Less Refilling: With a 6L extra-large water tank, the humidifier runs for more than 60 hours, giving you pleasant breathing for longer1-Step Top Refill, Thoroughly Clean: Pour water through the top opening, which removes unreachable corners—say farewell to difficult bottom refill, incomplete cleaning, leaking, and unhealthy mistHassle-Free Knob & 360° Nozzle: Easily set the mist strength and direction according to your own preferencesFor Master Bedrooms of All Size Up to 505ft²: Produces 4x faster humidifying (300ml/h) than others and sends powerful mist to any corner of your extra-large bedroomSuper Quiet: Put it in any place that needs peace and quiet, like the bedroom, study, or nursery, and hear the results—NEAR-SILENTWater Filter Replacement: Extend the life of the humidifier with the Levoit replacement filter, and get cleaner mist for your healthSatisfaction Guaranteed: Our California-based Customer Support Team is here to help you with any issues; if your product is defective, we'll send you a replacement right away so you don't have to worry about shipping yours back Troubleshooting: What is the water filter sponge? Why to use:andnbsp;Capture and filter fine impurities and particles, to improve humidifying efficiency in a healthier way. When to change:andnbsp;Generally lasts 1 month depending on hardness of water. Where to buy:andnbsp;Please search B09ZY9N6PD or LEVOIT 10-Pack Humidifier Replacement Filters on Amazon. Note: Distilled/ purified water is preferred for your health. Specifications: Product Dimensions:andnbsp;‎9.7 x 8.1 x 13.4 in / 24.5 x 20.5 x 34 cm Whisper-Quiet Operation:andnbsp;≤ 30dB Effective Range:andnbsp;215-505 ft² / 20-47 m² Material:andnbsp;BPA free, suitable for babies and adults.