"EverFlo is lightweight (31 pounds), smaller and sleeker, easy to store and transport, low maintenance, quiet, simpler for patients to use and maintain, no homecare provider filter change for two years, uses less power and produces less heat and has no filters for the patient to change. A recessed flow meter helps reduce the chance of accidental breakage. The Humidifier Bottle Platform is designed to be compatible with all bottle styles and features an easy-to-use Velcro closure. Overflow is designed with fewer parts resulting in lower overall maintenance costs. It has just two filters. The external filter can be changed in minutes without special skills or tools, and the internal micro disk filter is simply checked during routine maintenance procedures. Internal tubing storage keeps tubing conveniently available for use. SimplyGo has more than twice the oxygen output of any Portable Oxygen Concentrator (POC) weighing ten pounds or less. SimplyGo includes carrying case with shoulder strap and spare-battery pocket, detachable accessories bag, fold-up cart with oversized wheels, Lithium Ion battery and standard AC/DC power cords. SimplyGo has sleep mode which provides increased trigger sensitivity and a softer pulse for exceptional comfort. With a long-life compressor, high-quality parts, a high-impact resistant design, and oversized cart wheels, this portable oxygen concentrator was built to set new standards of ruggedness. Simply go has a long-life compressor, rugged chassis design and high-impact outer shell and handy fold-up cart with six-inch wheels."