The Bruce & Shark cool mist humidifier features a 3.2-liter (0.85 gal) water tank that delivers up to 18 hours of continuous moisture on the low mist setting to relieve congestion, coughing, and dry skin, with flexible timer options of 1, 2, 4, or 8 hours to match your daily routine, an ultra-quiet operation for deep restorative sleep so you breathe easier and sleep better, personalized mist control with a simple touch to adjust between Low, Mid, and High levels for your perfect ambiance, a 360-degree nozzle to control mist direction and provide focused humidity where it is needed most, and automatic shut-off that stops mist production when the water tank is empty to ensure safety and appliance longevity. The crystal stone diffuser features RGB lighting with 7 colorful lights, offering dazzling magical lighting that can be set to a single color or rotated through all colors to create your favorite mood lighting. Crystal stone diffuser with RGB lighting and 7 colorful lights