TS-8V Simulator 8 pos switch & variable

ABS plastic case with lid.
Face plate 1/8" aluminum.
Fixed rotary switch: -0.5, 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mv/v in 8 steps.
10 turn potentiometer for adjusting dead load and adjustment between steps.
4 banana jacks (red, black, green, white) color coded.
In/out switch for 10 turn potentiometer.
Excitation voltage up to 20 VDC/VAC.