Water resistant electromechanical personal body-care device

A handheld, electromechanical device useful in mammalian body-care comprising:

• a) a one-piece housing defining a volume and having one and only one opening defined by a rim, wherein said rim circumscribes a rim area, and said one-piece housing has a projected area that is substantially larger than said rim area;
• b) a unitary insert dimensioned to be insertable through said one and only one opening defined by said rim, disposed inside said one-piece housing, and comprising a frame having disposed thereon electromechanical elements interconnected in an electrical circuit;
• and
• c) a removable cover arranged and configured to close the one and only one opening of said one-piece housing, said removable cover having an exterior surface
• wherein said removable cover comprises a cap arranged and configured for removable engagement over said rim
• said cap has an inner surface disposed toward said unitary insert;
• said unitary insert has switch contacts disposed on a proximal surface of said unitary insert;
• said inner surface of said cap has an electrical conductor;
• and
• said cap is rotatable between a first position in which said electrical conductor is spaced away from said switch contacts disposed on said proximal surface of said unitary insert to open said electrical circuit and a second position in which said electrical conductor is in electrical contact with said switch contacts disposed on said proximal surface of said unitary insert to close said electrical circuit.