The power supply method of the module: take power from the car insurancegood this product does not need to be connected to the ACC power supplygood just connect the battery power supply and the ground wire Module installation location: 6-disc CD of the co-pilot of the vehicle Brief introduction to the module installation process: The optical fiber conversion cable provided with the product is plugged in with the 6-disc CD optical fiber interface of the cargood connected to the power supply of the productgood and connected to the ground wire. Product name:for Audio Optical Decoder Fitment: For A8/A8L 2004-2009 2GMMI systems For A6/A6L 2005-2009 2GMMI system For 2005-2009 2GMMI system Note:This product is only suitable for 2G MMI systemgood the product only has one audio input functiongood no video input function Built-in good module 5.0 Module access voltage:12V Colour:Black Material:Metal+ABS Package Contents: 1 * Audio Fiber Decoder Box 1 * audio cable 1 * power cable Only the above package contentgood 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. About Us We provide the good product with the best pricegoodwe support Wholesale/Drop Shipping Order 1. For Drop Shipping ordergood please remark"dropshipping order"good we will prioritize it. 2. For Wholesale/Drop Shipping ordersgood if you have any ideas about the price or packagegoodplease contact us in advancegoodwe will give you the best service to satisfy your demands. About Shipments 1.We will send out the orders ASAP once your payment is completed normally. 2.Please write your complete delivery address with correct phone number and zip codegood especially please confirm your full name. About After-sale Service We are reliable seller and we have our professional after-sale service for all of our customers. If there is any question about the ordergoodplease contact us in advance goodwe will always here until you get a happy answer. About Feedback 1. Please check the package and item when you get carefully to make sure there is no problem. 2. If you have any problem or are not entirely satisfied with your packagegoodplease don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you. 3. If there is no problemgood please leave us five star positive feedback. Your affirmation is our greatest motivation ! ! !