About this item

• SPDT Relay – Single Pole Double Throw, you can use them to open or close a circuit — or go from bright to dim on your headlights
• 30/40A Relay – It is rated to handle 40 amps of load at 12V DC in the Normally Open position (PIN 87), and 30 amps of load at 12V DC in the Normally Closed position (PIN 87a). You can use it in any circuit less than 30A
• With the Wire Harness – Makes relay installation a breeze. If one goes bad, just unplug it from the socket and plug in a new one
• Each socket has a male and female slide. You can connect as many of these together next to each other as possible. This makes mounting them easy and clean looking
• Wide range of use, can be used in automotive setup, seat warming, vehicle lighting system, car sound system and various other applications