• Compressed air technology: robust design and durable compressor for frequent use. • High conversion rate of 0.2 ml/min: fast delivery and shorter usage time. • Small, extremely quiet, and easy to use: built-in storage and carrying handle. • High efficiency: reduces waste and maximizes availability during inhalation. • The package includes: 4 filters, air tube, adult/child mask, mouthpiece, medicine cup, T-type connector, and detailed instructions.