The machine is designed like an old computer and monitor. It is white-gray with a long metal pipe connected on one side, and a small controller, with two levers on it, sticking out of its front.
The machine allows the user to temporarily switch lives with someone else to know what their life is like. The user can switch back to their own life by pressing a red button that attaches to their chest when they use the machine.
Role in episode
After discovering that he has nothing to eat again, save for holographic meatloaf, Plankton becomes jealous of Mr. Krabs' wealth and wishes he could switch lives with him. When Karen points out that Plankton had built the machine, he uses it to switch lives with Mr. Krabs.