Description: Including 3pcs relays and 3pcs pre-wired relay sockets. High capacity of 40A contact - able to handle those high current applications with ease. Hundreds of uses include- starter kills, domelight supervision, trunk release, polarity change,power door lock/actuator control, change a low current output to high current,ignition/accessory outputs, control motors/other electronics. It is also suitable for automobile used for control, alarms, horn, headlight and more.... Specification: Coil?24VDC Contact load: 14VDC 40A Coil resistance: 340(1 ±10%)? Heavy duty SPST relays 40 amp 4-prong relays , Interlocking relay sockets Size: Approx. 28*28*25.5mm/1.1*1.1*1 Inch Material: Plastic+Metal Package Includes: 3 Pieces Relays 3 Pieces Relay Sockets