Ocean Matrix Composite Video RCA Input Expander Switch-by-Ocean Matrix Ocean Matrix.Composite Video RCA Input Expander Switch.This is part of Ocean Matrix's series of new Economical AB-Switches that are designed to last with your pockets in mind! These helpful AB switches can also function as input and output expansions for any of your equipment. Designed to save you time and protect your expensive equipment from the wear and tear of plugging and unplugging connectors. Perfect for your home theater, studio or anywhere you would normally have to plug and unplug devices. Composite Video RCA connector AB switch. RCA connector is color coded Yellow for easy identification.