Specification: Colour: Black Voltage: 12V Current: 40A Contact Type: SPST Material: Metal, Plastic Pin Number: 4 Pin Note: The contacts on this relay are normally open (NO) Features: - SPST contact type - Durable - 12V DC rated voltage - Used for devices that draw high amperage, such as car alarms, remote starts, HID headlights, pop doors, trunk releases, strobe lights, fog lights, stereos, fans, air horns, and more Notes: 1. Please check the size measurement chart carefully before purchasing. 2. Allow 0.5–1 inch difference due to manual measurement (1 inch = 2.54 cm). 3. The color of the actual items may vary slightly from the listing images due to different screen settings; thank you for your understanding. 4. No instructions included. Package Included: 1 x Car Relay with Socket