Condition: and high quality High illumination allows for easy nighttime visibility. Same size as a standard lighter slot. The engine switch allows you to start your vehicle's engine using the installed button. This universal engine switch is designed for installation on various vehicles. DC: 12V (compatible with most vehicles) Dimensions: Outer diameter of the ring - 3.7 cm (1.46 inch) Diameter of the mounting hole - 3.0 cm (1.18 inch) To Start Engine: 1. Use your key to turn the ignition to the on position. 2. Press the installed switch to start the engine. Release once the engine starts. 3. Connect the two blue wires to the ACC and start lines. Red wire is positive, black wire is negative. Color: Black + Silver Material: Plastic Package Contents: 1 x switch 1 x harness with accessories Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.