Brand Name: BGMMED Origin: China Mainland Model Number: N3 Applicable parts: head Atomization rate: >0.2MI/min color: black & white Contraindications: None equivalent particle size: 3.7um +or- 25% For people: adult / kids / baby Inlet protection rating: IPX3 Material: ABS Noise: <50DB(A) Nominal frequency: 108kHz Operating power: constant Power Source: USB or 2 X AA alkaline batteries Use period: 5 Years(except for vulnerable parts)