AW or BZ 2017and The items may be different from our pictures according to different car styles, but the function is the same. Colour:black Material:plastic Installation:Remove the panel with tool and connect the cable between factory socket and button socket. Setting: After installation, start the engine while stepping on brake pedal, observe for 3-6 seconds. Don't press the button.The button light 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. Stop Canceller Automatic Stop Start Engine System Off Note: If you are not professional for technology, please don't buy this product Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Due to different product batches, the appearance , which does not affect the use Package Contents: 1 x Automatic Stop Start Engine System Off 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.