Upgraded model: KJ-8000PRO Flow rate: 1-2L (adjustable) Function: oxygen production, atomization Host size: 29.5*21*7.8cm/11.61*8.27*3.07 inches Net weight: 1.8kg Oxygen concentration: 60-40% Automatic shutdown time: 2 hours Noise: ≤50dB (measured at 1m) Life expectancy: 4 years (for reference only due to different daily use times) Standard accessories: silicone nasal oxygen tube *1, mask atomizing cup *1, home power cord *1, car power cord *1, manual *1 Packing: 1 set (color box + blank cowhide box): 39*33*13cm/15.35*12.99*5.12 inches, 2.6kg Older model: KJ-8000 Flow rate: 1L (non-adjustable) Function: oxygen production, atomization Host size: 29.5*21*7.8cm/11.61*8.27*3.07 inches Net weight: 1.8kg Oxygen concentration: 60-40% Automatic shutdown time: 2 hours Noise: ≤50dB (measured at 1m) Life expectancy: 4 years (for reference only due to different daily use times) Standard accessories: silicone nasal oxygen tube *1, mask atomizing cup *1, home power cord *1, car power cord *1, manual *1 Packing: 1 set (color box + blank cowhide box): 39*33*13cm/15.35*12.99*5.12 inches, 2.6kg Oxygen concentration: 40% Automatic shutdown time: 40 minutes Noise: ≤60dB (measured at 1m) Life expectancy: 2 years (for reference only due to different daily use time) Low noise: efficient brushless motor, intelligent quiet core system, enjoy 50 dBA quiet sleep, such as the breeze blowing through the leaves, forget its existence, carefully guard the health and comfort of your breath. Easy to carry: sleeping at home is stable and comfortable, saving labor and money, simple intelligent human-computer interaction, simple and clear operation. Simple operation: The operation is very simple and humanized, can meet the needs of the whole night use, at the same time, easy to clean, flexible air duct, three-dimensional cover, leak proof, simple and practical. Intelligent: intelligent anti-reflux, comfortable and safe to use; Intelligent anti-dry burning, fresh breath, automatic stop protection over temperature.