The Single Pedal Tamer is a multi-function utility switcher! Uses include: -True bypass loop. -A/B switcher for two guitars by connecting a guitar to the input and another to the Return jack. -A/B switcher for two amps by connecting an amp to the output and another to the Send jack. -Mute switch. Leave nothing plugged into send/return jacks. Or plug a tuner into the send jack to mute while tuning! -Momentary kill switch. Set toggle to momentary, leave nothing plugged into send/return jacks, and tap for cool stutter effects!