Philips Respironics EverFlo Q with OPI Oxygen Concentrator
Compact design that only weighs 31 pounds and is easy to transport
Oxygen purity indicator (OPI)
At less than 40 decibels, it is one of the quietest home concentrators
A low maintenance machine with 2 filters that only need to be changed after 2 years
Uses less power than other home concentrators which results in a lower electricity bill