Cool, invisible moisture helps temporarily relieve dry air discomfortsWide tank opening is easy to fill and cleanRequired wicking filter removes minerals from the water helping to prevent white dust; one filter included with humidifier (Replacement Filter HC888 Series Filter C)Easy to use : 2 speed settings adjust moisture output and sound level,Runs up to 18 hours on low settingDesigned for small to medium rooms0.8 gallon tank capacity3 year limited warranty"