Fitment: For XA50 2019-2022Function: Close the feature of auto start & stopInstallation: Remove the panel with tool and connect the cable between factory socket and button socket.Instructions:After installation, start the engine while stepping on brake pedal, observe for 3-6 seconds. Don't press the button. The button light will turn red itself. The default setting is that you don't have to close the stop start engine function manually every time. If you want it for a moment, press the off button to reactivate the function.Colour:blackMaterial:plasticPackage Contents:1 x Car Automatic Stop Start Engine System (plug: color random , don't accept the specified color)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.