Respironics' EverGo Portable Oxygen Concentrator: The EverGo Portable Oxygen Concentrator from Respironics is the oxygen therapy solution that lets active patients do the things they want – without worrying about running out of oxygen. Its 8-hour battery life, 1050 ml per minute oxygen capacity, lightweight design (weighs less than 10 pounds).  Includes 2 year warranty.

SeQual Eclipse Portable Oxygen Concentrator: Weights 17 pounds with battery and comes with 3 year warranty. Operates in pulse or continuous mode. Perfect for adding oxygen to your CPAP or BiLevel treatment as well as everyday use.  Call or E-Mail for Best Pricing.