Certainly, yes - the xxxEUS (or xxxPES) indicates that the package (switch, power supply, instruction leaflet, etc.) is intended for the European market - and that includes Switzerland. These units will almost certainly come with external power supplies, in this case probably with the two-pin "8" connectors and a matching two-pin Euro cable. Where manufacturers and distributors may only include UK or Schuko cables (possibly also direct imports), Digitec Galaxus still includes matching Swiss cables (or fixed adapters, especially for white goods).