Dunlop M196 MXR A/B Box Effect PedalThe MXR A B Box allows you to route your instruments signal to two separate output amp paths. Use it to switch between amps or run them both at the same time with different effect configurations so you can find your ultimate sound. Use the Thru jack to connect to a tuner, amp or other device that you want to receive a constant signal. The MXR A B Box comes in a heavy duty die cast housing with high quality jacks and switches. Specs: Versatile signal