TET 1. ON/OFF LED: Instructs effects or bypass status of The Walter, when the LED Ia it up, the effect Is on. 2. Input Jack: 1/4” man audio Jack, for connecting the guitar. 3. Output Jac) 124” mono audio Jack, outputs the signal. 4.DG IN Power Jack For power supply, use a 8-volt DC regulated AG adapter ity is positive on tha barrel and negative on Soar tout tosh ‘and tum often tha pedal In different modes.