This Law of Resistance Kit comes with everything you need in order to experiment with the resistance of electrical current through different types and sizes of conductor wires. This kit includes two digital multimeters that come with 2 patch cords each, 4 Connecting cords with banana ends (2 Red and 2 Black), and a platform with 4 different conductor wires connected to input sockets on both ends of the platform. It is not recommended to use a power supply to run electrical current through the wires in your observations.