This style transformer was used in many chairs with Okin, Limoss, and FBS electronics to power the heat and massage functions if present.  Chairs that had this system almost always had two separate transformers; this one for the heat/massage, and another to make the chair go up and down.

Please Note: To determine whether you need this older style #6234 or the newer style #6236 transformer, you need to take a look at the plug coming out from your chair that will plug into the transformer;  Specifically, look to see if it has a small pin in the middle of the plug.  If it has a small pin in the middle of that plug, you will need this #6234; if it doesn’t have that small pin, you will need the #6236.