The Crestron AV4 Advanced Control System Processor M201921001 6512049 is a new unit designed for Crestron brand compatibility. It features wired connectivity and Crestron smart home protocol for seamless integration into your smart home setup. This processor is a single unit made in China, specifically designed for Crestron compatible products and models. With its advanced capabilities, this control system processor allows for efficient control and automation of various electronics within your smart home setup.