Analog Bucket-Brigade technology Gig-saver bypass (signal passes even if your battery dies) Inputs: One 1/4″ jack Outputs: One 1/4″ jack – For Mono output use a standard 1/4” cable to your amplifier. For stereo operation to two amplifiers use a 1/4” Y cable with one 1/4” TRS to two 1/4” TS jacks. Power: Nine-volt battery or optional universal power supply Controls: Engage switch Warranty: Three year limited Optional: 9 volt power supply