Particle Size Created By Our Vat Bottle Is Around 2.339 Μm (Mmad) Tested By Cascade Impactor. Compared To Most Bottles In The Market, Our Proprietary Bottle Ensures More Efficient And Effective Performance. • Mmad ≤2.6 Μm; Fine Particle Dose (Fpd): 75-80% • Consistent Fine Particle Size For Efficient Respiratory Treatment • Patented Valve Adjustable Nebulizer Bottle (Vat) • Mini Pump Technology • Low Noise And Quiet • Very Compact (13.5 X 8.8 X 5.4 Cm) • Light Weight (302 G) • Mouthpiece And Masks For Adult And Child Included • Built-In Nebulizer Kit Holder • 12V Adaptor Included