View on LOZ Suggested Retail: $289.99. DEDAKJ Oxygen Concentrator 1-7 L/min O2 Generator Portable Intelligent for Home Machines 93% High Purity AC 220 V Remote Control for Home and Travel Cars - DE-1A. Oxygen emission: with an oxygen purity of over 30-90% and an adjustable flow rate of 1-7L/M, you can enjoy clean air at home. Delivers an even flow of up to 90% pure oxygen from normal air. Multi-layer filter: the oxygen system of this product has a coarse dust filter, a fine dust filter and a three-bacterial filtration treatment for the input air. Finally, the oxygen is fresh and clean after filtering, and the filter with two front layers can be replaced without disassembly, the user can operate it comfortably. Widely used: respiratory diseases, cardiovascular and cerebrovascular diseases; plateau hypoxia; people of middle and elderly age, pregnant women, students who have been mentally active for a long time; people who have long been in the ground or in the confined spaces, excessively exhausted by movement and oxygen deficiency. Note: This device is used for family health care, not for severe diseases. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.