The Expression Ramper allows you to select two expression settings and switch between them, either in one motion or as a continuous LFO activated by a single footswitch.
Connect it to an expression-enabled effects pedal, select the first expression setting in the A position and then the second in the B position. From here you can move between A and B in three different ways: in TRI mode, it glides from A to B in a linear triangle wave, while in SQR mode, it makes instantaneous jumps. A< >B mode triggers a one-shot sweep where each press of the footswitch jumps from one position to another. The speed of the LFO and one-shot movement is adjusted by the Rate control.
Note: Battery operation not supported.