Feature 1[Fitment] Designed to replacement for A3 A4, replacement for Focus 1920 (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.Item Type: Car Rearview Camera Activation ToolMaterial: ABSColor: RedApplication: Used to activate the rear view camera that is not activated or subsequently installed in the original carFitment: Replacement for A3 A4Replacement for Focus 19-20 (Harman host) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Activation ToolNote1. The original car comes with a MIB screen host, which can be activated2. The MIB screen machine that comes with the high end car, disassemble it and refit it to the low end car, and connect it to the original car's CAN line, which can be opened. (Note: This product is not applicable if the MIB host is modified with low configuration and the decoder wiring harness is used directly)3. Foreign MIB, PQ, MQB system with screen host, which meets the first and second conditions, the same applies to this product4. Please pay attention to whether it is suitable for the use of the model before buying