TotalComfort Warm & Cool Mist Ultrasonic Humidifier | 1.7 Gallon Tank, 80 Hour Runtime, Nightlight, Dual Tanks | Clean Tank Technology, BONUS 2 DEMINERALIZATION CARTRIDGES, Whisper-Quiet | HoMedics WARM AND COOL MISTING OPTION: The Ultrasonic Humidifier by HoMedics features a warm and cool misting option. Humidify your room with cooling mist during hot summer months or warming misting during cold winter months. Adjust the intensity of the mist with the easy-to-use control buttons. Its hefty 1.7 Gallon Tank has a runtime of up to 80 hours! Its ultrasonic technology keeps your air free of harmful allergens DUAL WATER TANKS FOR EXTENDED RUNTIME: HoMedics designed this humidifier with 2 water tanks for a combined capacity of 1.7 Gallons. With this large volume of water, you can humidify your home up to 80 hours! Relax during the dry winter months as this humidifies your air with a warming mist that will reduce dry skin and chapped lips. Each tank features a durable-plastic housing. This mister was crafted with auto shut off protection. It will power down when it gets too low on water CLEAN-TANK TECHNOLOGY: The ultrasonic technology keeps your tank looking and smelling fresh and clean. Its clean mist anti-microbial technology helps prevent the growth of molds and mildews on the surface of the tank. It also prevents the buildup of white dust caused by hard water that can settle on your floor, appliances, and furniture. It features an on/off nightlight for toddlers who need a relaxing glow in the night EASY TO USE AND CLEAN: TO USE: This mister is very user-friendly. First, unplug the unit and fill the large 1.7-gallon tanks and power it on. Choose to humidify your home with a warming or cooling mist. Adjust the mist output to your specification. TO CLEAN: Use a 50/50 mixture of vinegar and lukewarm water to clean the inside of the tank. Clean the water tank every 2-3 weeks depending on usage and water hardness WHATS INCLUDED WITH YOUR PURCHASE: One HoMedics Cool & Warm Mist Ultrasonic Humidifier. Two BONUS demineralization cartridges. One users manual