AROMA AAS-3 AC Stage Acoustic Guitar Simulator Guitar Effect Pedal with 1/4" Plug Zinc Alloy Connector 3 controlling knobs and 1 switch are accurate and high sensitive. Mode switch: Switch between standard, jumbo and piezo mode. Output jack: 1/4" mono audio jack for signal output. Input jack: 1/4" mono audio jack for connecting guitar. Come with a Connector.