Hermann Portable Mesh Nebulizer FAST THERAPY & SILENT Portable Compact Appearance Suitable for Children Silent Use Advanced Micron-level atomizing Advanced vibrating mesh technology MMAD 5μm Stable Atomizing Symptom Relief Timing Function Self-Cleaning Ability Noise Level <30dB Multiple Accessories (1 adult mask, 1 child mask, 1 mouthpiece, 1 storage bag, 1 usb cable) 2 Ways of Power Supply: batteries and usb cable Nebulization rate: ≥ 0.2ml/min MMAD Average Particle size: 5μm Medication capacity: 8ml Noise level: ≤30dB Dimensions: 45 mm x 63 mm x 123 mm