Auto camera activation tool for A3 A4 - Red replacement car accessory1、[Fitment] Designed to replacement for A3 A4, replacement for Focus 19‑20 (for Harman host), which is perfect match with your car. 2、[Function] It is used to activate the rear view camera that is not activated or subsequently installed in the original car, and you need to pay attention to whether the host screen is suitable before purchasing. 3、[Reusable] This product is not a disposable product, it can be reused for many times to meet your various needs 4、[Durable Material] This activation tool is made of high quality ABS material, which is durable and has a long service life, so it can be used with confidence. 5、[Stable Performance] With stable performance, no need to worry about any quality issues, and undergo strict quality control to ensure product quality.