RST300 is a standard 19-inch, 1U rack frame designed to house Wisycom CTS910-D and MSR918-D units in a fixed rack installation. It functions as a dedicated mounting accessory for wireless devices rather than an active signal-processing device, providing stable mechanical support and alignment for the two modules. The frame is sized for 19-inch equipment rails and supports a clean, professional rack layout in broadcast, event, or venue setups. The product is listed as a discontinued accessory by the manufacturer, with no included accessories.