Donald B.
Excellent!!!
Bought 3 products after researching for weeks. O2 ring, wireless bp/ekg monitor and oxygen concentrator. I've been thoroughly impressed with all 3. The O2 ring works flawlessly and better than expected as does the bp/ekg monitor. The app for these is great with proper information recording. The oxygen concentrator works great and is much quieter than the concentrators I've rented previously. Shipping was quick and prices are more than fair.



