The Crestron® CEN-IO-RY-204 is a compact and cost-effective wireless I/O module designed to easily expand the available relay ports within a commercial or residential system. A small form factor allows the CEN-IO-RY-204 to be placed just about anywhere, with the option to attach it to a flat surface or DIN rail using the included mounting bracket. The four onboard relay ports enable direct integration with all kinds of third-party equipment. The CEN-IO-RY-204 communicates to the local network over Wi-Fi® wireless communications, allowing the connected equipment to be remotely controlled and monitored from a computer or tablet. Power is conveniently supplied to the CEN-IO-RY-204 via an included 5 VDC power pack.