These operation switches can adjust manually the speed of multi-stage electric motors (fans). Several motors can be connected as long as the maximum indicated current has not been exceeded.
Thanks to their splashproof casing (IP44/54) (as well for surface-mounting as for flush-mounting) they can be used in most exacting (like humid) circumstances (e.g. Kitchens or bathrooms)
When developing this switch, special attention was paid to design and duration of life.
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