EMS Fascia Gun Warranty and After-Sales: Terms Buyers Should Negotiate
A combined device has two systems that can fail independently, which makes a single warranty percentage misleading. How to structure the terms.
A combined EMS fascia gun contains a mechanical drive and a stimulation circuit, and the two fail for different reasons at different rates. A single warranty percentage applied to the whole device hides that difference and usually ends up absorbed by whichever subsystem fails first.
The drive mechanism behaves like any percussion gun: linkage wear, motor bearings and battery degradation. These are the failures that appear after months of use, and their rate depends on how hard the device is used.
The stimulation circuit behaves differently. Its most common field complaint is not failure but degradation of contact, usually caused by worn electrode pads rather than by the electronics. That is an accessory problem wearing warranty clothing, and it is worth separating explicitly.
The practical structure is to warranty the device as a unit but to document the accessory pads as consumables with a stated session life, and to require a failure analysis report on any batch with an unusual claim rate. That last clause is what turns a warranty from a cost centre into a feedback loop.
Aolemon quotes twelve-month warranty on EMS fascia guns, states the session life of electrode pads and gel as consumables, and supplies replacement pads, heads and battery packs as orderable spares with a documented part list.