Very Compact, only 14.5 x 10.9 x 7.3 cm. Consistent fine particle size for efficient respiratory treatment. Patented valve adjustable nebulizer bottle. Very low noise with silencer and vibration absorber design. Including mouth piece and masks for adult and child 12V adaptor. Features: Very low noise with silencer and vibration absorber design, valve adjustable nebulizer bottle, controllable nebulization rate at consistent particle size, 86.74 percent fine particle dose, consistent fine particle size for efficient respiratory treatment, built in nebulizer holder.