It is an object of the invention to provide a lightweight semiconductor device having a highly reliable sealing structure which can prevent ingress of impurities such as moisture that deteriorate element characteristics, and a method of manufacturing thereof. The RC portion of the relaxation oscillator includes a resistance ladder and a set of momentary on pushbutton switches disposed change resistance dependent upon which key is pressed. This allows a user to quickly and effectively clear a jam and resume or continue rapid fire without damaging projectiles, the loader or the paintball marker. The acknowledgement may be received from a remote control that controls various functions of the television screen.