A gaming device which, in one embodiment, has a sound generating device operable to produce a background sound. Since the power converter circuit has a synchronous signal of a driven signal of enabling the first primary switch and the second primary switch, a triangular wave signal is generated. A further aspect of the present invention provides a back window, which can be raised and lowered. When the locking lever is at an open position, first and second connectors are ready to be connected together. Openings may be processed to enhance resistance to stress-induced cracking of the plastic structures along the sidewall surfaces.