So you are tired of having to buy different adapters for your electronics? The KJS Adjustable Power Supply can help. It is an adapter with adjustable voltage of 3V to 12V @ 5A. It lets you change the voltage with the twist of a knob and shows it on its digital display.
This adapter comes handy for those of you into DIY electronics and robots. It can be dialed 3V, 5V, 6V, 9V, or 12V based on what you are making.