Honeywell HCM-750B Easy-to-Care Cool Moisture Humidifier, Black Soothing, invisible moisture to relieve dry air discomforts Comfort control humidistat automatically turns on and off to maintain set humidity levels 3 speed settings to adjust moisture output and sound level Runs up to 48 hours per filling on low setting Wicking filter removes impurities from water reducing white dust and providing clean moisture output. To ensure stated product performance, use only genuine Honeywell Replacement Wicking Filter model HAC700. It is treated with Protec antimicrobial to inhibit up to 99.99% of mold growth on the filter