【Household Oxygen Concentrator】 This oxygen concentrator produces 1L oxygen per minute, oxygen concentration is greater than 40%* 1L/min oxygen concentration flow, 20°C/hour pressure, 60%RH/relative humidity, this oxygen production complies with European and U.S. oxygen hygiene standards. 【Unique Design】One-button start, simple operation, plug-in type, equipped with high-brightness LED lights to solve complex operation problems, can be placed horizontally and vertically, and weighs only 1.88KG, which is lighter. 【Double Cleaning and Filtration】This oxygen concentrator uses a dual filtration and cleaning system (biochemical cotton filter and oxygen permeable membrane filter) to kill bacteria, viruses and pollutants and provide you with high concentration of oxygen. 【Deep Noise Reduction】 Multiple noise reduction design, 45 decibel silent design, silent operation, it will not affect you and your family's sleep even if it is turned on all night. 【Timed shutdown】One-button operation, easy to operate. Three timer buttons can be set from 20-120 minutes. Comes with carrying case