Car one-button start 12V Replacement Car Engine Start Stop Push Button Keyless Entry Ignition Starter Switch Specification: Product specifications: thickness: 10mm, (excluding 4 angle iron) outer diameter: 40.8mm (without black silicone ring) Line position function: Red line (Button +12V power supply line) Black line (button LED light negative control) Yellow line (key switch positive power trigger output control) 3-line function description: + Positive trigger output control, after pressing the start button, the yellow line outputs +12V; the black line connects the button light to control the negative output line, and the button light illuminates. Package Included: 1 x Car Engine Start Stop Push Button