The present invention pertains generally to the field of computer graphics user interfaces. If the real-time broadcast content can be received, a control portion controls the tuner so that it may receive the delivered real-time broadcast content. A level shifting circuit is responsive to the input signal having a second polarity for shifting a level of the input signal to produce a shifted signal of the first polarity at a level determined by the input signal. The device includes a plunger sized to extend into the barrel member.