Control Your Devices Without Noise Simplify your installation with the Stinger SWITCHHUB (SPXSH440) solid-state relay. Replace up to 4 typical mechanical relays with one easy-to-wire solid-state relay block saving on extra wiring, additional harnesses, and not to mention, a better connection. Solid-state relays operate silently and produce very little interference whereas conventional mechanical relays can also fail after excessive use.
