Philips Respironics Oxygen Concentrator – EverFlo Model A medical device for producing pure oxygen from room air, suitable for asthma patients, shortness of breath, the elderly, and for home use. ✔ Easy to use ✔ Practical and quiet ✔ Has a counter to adjust the oxygen amount ✔ Withstands long use Needs. One cover is broken. Only one Condition: Used, clean, and works well Price: 600﷼ 📩 For contact