Our silent switching A/B switch with an added footswitchable FX Loop to add or bypass your effects before choosing between the two outputs. Also, you can choose a reverse A/B for 2 inputs and one output for use with 2  instruments!Power: 9v DC,  tip (-) Dimensions: 4.7" widex 2.7" deep 

Smokin' Amp Co. A/B Switch with Loop Switch