A handheld, electromechanical device useful in mammalian body-care includes a one-piece housing, a unitary insert, and a removable cover. The one-piece housing has a single opening defined by a rim. The rim circumscribes a rim area, and the one-piece housing has a projected area that is substantially larger than the rim area. The unitary insert is dimensioned to be insertable through the opening defined by the rim, and it has a frame having disposed thereon electromechanical elements interconnected in an electrical circuit. The cover is arranged and configured to close the opening of the one-piece housing.