Installlation 1.Turn on stereo, switch to "AUX mode" on your car stereo.(Some host settings need to turn ON the AUX mode switch first, then choose AUX.) 2.The volume of AUX itself is very low, please adjust the AUX volume and the volume of your phone to the maximum. 3.If the "AUX" mode does not work, please switch your stereo setting from "AUX" to "POD". Support Models: Must work A3 A4 with MMI 3G+ systems. A1 Sportback 2012-18 A3 Coupe Sportback Cabriolet 2013-16 A4 Allroad Quattro,Avant,Saloon L 2013-16 A5 Coupe Sportback Cabriolet 2012-17 A6 Saloon L Avant hybrid allroad quattro 2011-18 S3 Coupe Sportback Cabriolet 2013-16 S8 2012-17 A8 L hybrid 2010-17 S1 Sportback 2015-18 A7 Sportback 2011-18 Q3 2012-18 RS Q3 2014-18 S4 RS4 Avant Saloon 2013-15 Q5 SQ5 Hybrid 2013-17 Q7 2010 -15 S6 RS6 Saloon Avant 2013-18 S7 RS7 Sportback 2013-18 S5 RS5 Coupe Sportback Cabriolet 2012-17 with RCD 310, RCD 510, RCD 550 radios, RCD 850, RNS 510 and RNS 310/315 ) after 2009.

Compatible for all A3 A4 2009 & onward model which equip with AMI system. Perfectly matching with the original car. Generally fit for A1 A3 A4 A5 A6 A7 A8 S1 S3 S6 S7 S4 S5 Q3 Q5 Q7. Work with most of mobile phones, pads, notebooks, players with usb Type C port. DIGITAL HI-RES AUX- Rate: 44.1K/48K/96KHz, and Bit resolution: 16/24bits. Provides you real high fidelity AUX, stable digital signal output, efficient and safe, no overheating.DAC CHIP - Built in high quality AUX DAC Noise Reduction Chip, high fidelity design to ensure stable and no loss transmission of signal, sound quality will not be reduced by transmission. 2 IN 1 FUNCTIONS: Support play music and cha-rgi-ng while your devices is connected, you can enjoy music in full stereo sound. NOT display the song names on the car screen and NOT control on center console. Only AMI/MMI 3G+ system can playing music and cha-rgi-ng at the same time. If your MMI system is 2G or 3G, please do not order!!! Please check your MMI system according to picture 2 before order.