Fogger will turn off/stay off automatically if there is not enough water. There is one red LED Light on this model as an on/off indicator. Adjustable grommet on the cord near mister unit. For indoor use only. Fogs an area of 16" x 16".Item Dimensions: 2"Lx2"Wx2"H Creates a mystical fog from water within seconds Simply place in water and watch it Fog The dry ice effect without the dry ice No chemicals needed Completely safe Uses ultrasonic sound waves to create the mystical fog Just add a few drops of aromatic oil to the water for a soothing fragrance.