Wooden Electric Air Freshener Humidifier /Diffuser-Light Brown Can run for up to 12 hours at a time. 4 time setting modes: 1 hour/3hours/6hours/continuous (until water runs out) Automatically shuts off when water runs out. Ultrasonic, which also means ultra quiet. Large 400ml Container Easy to clean Works great with both scented & essential oils. Coated with a beautiful faux-wood grain.