Elenco MX510L is an electronic device that allows you to assemble a functional flashlight. It includes a plastic frame, panel key, top egg lugs, washers, screws, tapping screws, spring terminals, key lever nuts, flash light PCB assembly, and battery case with wires. The device can be used to conduct two experiments. In the first experiment, you can operate the light unit using batteries. In the second experiment, you can operate the light unit using a generator without a battery. The device is a great way to learn about electricity and electronics.