A rotatable transfer apparatus includes a housing and a circuit board having at least two interfaces. The housing includes a top cover, a sidewall, a bottom board and an elastic module. The top cover is rotatably mounted at one side of the sidewall. The bottom board is mounted at the other side of the sidewall opposite to the top cover. The sidewall, the bottom board and the top cover define a receiving space for receiving the circuit board. The sidewall includes an opening, and at least two fasteners defined in an internal surface of the sidewall. The elastic module is received in the receiving space and fixed to the top cover. The elastic module rotates with the top cover and detachably engaged with one of the at least two fasteners to select a desired interface to be exposed to the opening.