PCD-FDE1 App for Russound Controllers Allows the Russound DMS-3.1 Digital Media Streamer and MyRussound App to be used with older Russound controllers Supports Russound CAV6.6, CAM6.6, CAM6.6T, CAA66, and CA4 controllers Controls any zone and any source in the system including RNET and IR-controlled sources Compatible with the Apple iPhone, iPad, iPod Touch, and Android based devices Technical support via Email. Note: Phone support is not available for this product.