For sale is a vintage Grass Instruments S48 Stimulator.

This unit was pulled from a working environment. As shown in the photos, the device **powers on** correctly, and the power indicator light is bright. All knobs and switches are physically intact and move as they should.

I do not have an oscilloscope to test the electrical output, so the full functionality and calibration are unknown.

What you see in the pictures is what you will receive.