We strongly advise against plugging your Suvie into a 220V outlet, or use a transformer. Doing so will void your warranty.
The Suvie appliance must be grounded while in use to protect the operator from electrical shock. Suvie is equipped with a 3-conductor cord and a 3-prong grounding-type plug to fit the proper grounding-type receptacle. The appliance has a plug similar to figure A below.
The grounding tab which extends from the adapter must connect to the permanent ground in the outlet box. See the figure below.
Plug your Suvie into a GFCI (Ground Fault Circuit Interrupter) if within 6 feet from a sink.