A device for dressing shellfish comprises a handle and a working end. In one embodiment, the SAW device includes: a piezoelectric substrate, a conductive layer located over the piezoelectric substrate and a resistive layer, interposing a portion of the conductive layer and the piezoelectric substrate, that forms a return path for static charge migrating from the piezoelectric substrate to the conductive layer. Connection errors may be detected automatically and a first indication may be displayed automatically when the connection errors are detected.