A new device, used for one month. A home oxygen generator from the company "Makthaf" (Concentrator), Philips model EverFlo. It is expensive, but we will be considerate of the price. Light use, operating hours counter 21063 hours, and it runs on 220V electricity. It has an oxygen percentage sensor and is suitable for the elderly or patients with respiratory problems. Location: Riyadh. Urgent sale, negotiable.