Relay is an electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit. It is temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet. An electrical device that provides a path for electrical current to flow. Brand-Omron, Type-4PDT, Pole-4, Rated Current-A, Rated Voltage-100/110 VDC, Model Number-LY4N DC100/110 BY OMI, Warranty as per manufacturer's warranty policy.