TERKs RF Modulator allows video components such as DVD players, video game systems, VCRs and camcorders to be viewed on televisions that are not equipped with an available audio/video jack. Selectable to channel 3 or 4 output, the RF Modulator automatically switches to the video source when an incoming signal is detected. TERKs RF Modulator is the ideal way to connect multiple components to any television, making it easy for everyone in the family to enjoy their favorite movies, video games and other video sources anytime.