All Flex Cardio devices, Revision C
Model/Product Numbers: 453564634201, 453564534211, 453564621791, 453564621801, 860335 and 860338
Flex Cardio devices, Revisions A and B
To assist in identifying affected devices, each affected device has at least one of the following numbers on the label on its back:
Service #: 453564241901 and 453564483321