This high-performance automotive relay is designed for various vehicle applications including cars, trucks, RVs, and boats. usually in the interior to feed power hungry accessories, typically stereo amps, but also for cameras, monitors, cell phone boosters, etc. I install it under the dash, run one fused power cable from the battery, then used a switched accessory fuse to turn it on with the ignition. Built with a durable nylon flame retardant shell and pure copper inner core, it delivers superior heat resistance and electrical conductivity. The relay features a 4-pin SPST (Single Pole Single Throw) configuration with 200A high switching capability, making it ideal for demanding automotive electrical systems. The precision-engineered pure copper coil ensures strong conductive performance with minimal loss rate, while the AgSnO2 composite silver contacts effectively resist bonding for extended service life. Operating on 12V DC (14V max), this relay efficiently converts small current outputs into large currents, helping extend the life of your vehicle's electrical components. Each package includes 2 split charge relays complete with installation accessories . Perfect for automotive enthusiasts and professionals seeking reliable high-current switching solutions.