Quick Overview
The CD-IU201S is compatible with the AVH-P8400BH and is required for Advanced App Mode functionality (that is found on the AppRadio) and also enables audio and video playback from your iPhone 4/4S or iPod Touch 4th Gen.
Details
Use the CD-IU201S interface cable to connect an iPhone 4/4S or iPod Touch 4th Gen to the AVH-P8400BH for the ability to display and control compatible iOS apps on the touchscreen though Advanced App Mode. You also get full, direct, and adapter-free iPod control. The direct digital connection assures you get the utmost audio and video quality from your the media stored on your iPod or iPhone.