Yuwell (Yuwell 7F-5) Home Oxygen Generator in Excellent Condition - 5 Liter For sale: An oxygen concentrator from the global company Yuwell, model 7F-5, known for its quality and high durability. The device is ideal for home use for patients with shortness of breath and COPD. Specifications and Features: Capacity: 5 liters (adjustable flow from 0.5 to 5 liters/minute). Oxygen Purity: Up to 95%. Operating Timer: The device has only operated for 3043 hours (considered average usage, and the device lasts for thousands of additional hours). Condition: The device is very clean, operates with high efficiency, and without any malfunctions or abnormal noises. Ease of Movement: Equipped with wheels for easy movement between rooms. Safety: Features an alarm system for power outages or pressure drops.