Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Condition: 100% new and high quality The highly Blue illumination allows for easy nighttime visibility. The size as for a standard Lighter Slot The Engine Switch allows you to your vehicle's engine only by the installed button. This universal engine switch allows for installation on any vehicle. DC: 12V (Fits for all vehicles) Dimensions: Outer Diameter for the ring - 3.7 cm (Dia) / 1.46 inch (Dia) Diameter for the hole - 3.0cm (Dia) / 1.18 inch (Dia) To Engine: 1. your key to turn the ignition key on. 2. Press the installed switch to engine. Release as soon as the engine fires. 3.Two Blue Wire:to Line and Line. Red is Postive,Black is Negtive Colour: Black + Silver Material: Plastic Package Contents: 1 x switch 1 x harness with accessories Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.