Recommended for those worried about the New Year's holiday period. I am selling an oxygen concentrator because I rented an oxygen chamber at the hospital. Only the green hose was used. I used a simple oxygen tent, so it was not directly inhaled. Please rest assured. I purchased it on Amazon on October 3, 2025, for emergency use. I only used it in a hurry on a closed day in December because the pet would come out energetic when practicing operation in the oxygen tent. The seal is still attached. I was skeptical, but the breathing seemed calm during use. It looks like there are scratches, but I think they are from the seal because the seal has not been removed. I will ship it in the box I received from the company. Product Name MEDRIS Medical Home Oxygen Generator JY-102W (Distributor: IKOU Co., Ltd., Hikone City, Shiga Prefecture) *This is a home health device and not a medical device. Performance Oxygen concentration 93% (maximum): Flow rate 1L/min (minimum) Oxygen concentration 35% (minimum): Flow rate 7L/min (maximum) The combination of oxygen concentration and flow rate is fixed; increasing the oxygen concentration reduces the flow rate, and increasing the flow rate lowers the oxygen concentration. This is a common specification for home oxygen generators. Product Contents ・Main unit ・All accessories (remote control, replacement filter, tubes) ・Instruction manual ・Box (will be shipped in the original packaging) Product description page of the distributor (IKOU Co., Ltd.) https://shop.i-kou.jp/products/%E5%AE%B6%E5%BA%AD%E7%94%A8%E9%85%B8%E7%B4%A0%E7%99%BA%E7%94%9F%E5%99%A8-yang001 It is not something that is moved around much, so it is in good condition, but it is a used item. To prevent substitution, returns and exchanges are not accepted. Please understand.