GCE HEALTHCARE Zen-O lite, Portable Oxygen Concentrator, Model RS-00608-X-S

Reason: Erroneous calibration values, potentially resulting in: as the device ages, oxygen purity will gradually decrease to the point where the device alarms to indicate low oxygen purity will be incorrect.

Code information: Serial Numbers: ZL316367, ZL316446, ZL316462, ZL316475, ZL316481, ZL316484, ZL316490, ZL316493, ZL316503, ZL317057, ZL317087, ZL317088, ZL317090, ZL322386, ZL322387, ZL322390, ZL322392, ZL322409, ZL322412, ZL322439, ZL322441, ZL322442, ZL322443, ZL322445, ZL322447, ZL322451, ZL322455, ZL322456, ZL322462, ZL322463, ZL322466, ZL322467, ZL322470, ZL322472, ZL322473, ZL322837.

Distribution pattern: US Nationwide distribution in the states of AR, FL, VA, ND, MS, MN, CA, NV, KY.