This is a simple Operational Amplifier Box that is used to invert or non-invert and amplify AC or DC electrical signals. The circuit is fully contained in a black plastic box and includes a printed circuit board with 3 banana jacks on the top and side to power the Op-AMPs. The PCB has surface mount footprints to adjust the gain as well as pin sockets for through -hole resistors. In addition to the gain setting resistor options (surface mount or through hole), there are also capacitor locations for configuring the Op-Amp with RC filters (up to double pole low or high-pass), or making an integrator, or differentiator. The PCB has two Op-AMP locations, one set primarily for inverting and the other for non-inverting feedback configurations and accepts DIP 8-pin through-hole packages for plug and play amplifications and experiments. There is also a couple of small via arrays for proto-typing additional circuits. Perfect for hobbyists, tinkerers, and electronics laboratories.