BOXED CAR TIMER SWITCH TIME RELAY 0 TO 40 SEC KIT 12V20A Delay OFF UNIVERSAL Description: A time relay with adjustable precision ranging from 0 to 40 seconds. The dimensions, including the box, are as follows: Length: 40 mm Width: 27 mm Height: 21 mm Power Supply: 12V DC with built-in protection against reverse supply voltage. Wired with 10 cm wires: Black: Negative 12V (-) Red: Positive 12V (+) Two white wires: Normally open contact (NO) of the relay Normally closed contact (NC) ? not wired Relay Specifications: 20A/12V DC - NO contact 10A/12V DC - NC contact (available but not wired) Features: Time adjustment via a trimmer Operational principle: Upon power activation, the relay engages, closing the NO contact and opening the NC contact. It maintains this position until the set time elapses. Upon restarting the power supply, the cycle repeats. Note: The relay output does not have a 12V output. The device is housed in a plastic box as seen in the picture. Package Contents: Mini Time Relay Instructions for use and wiring diagram.