12x1 synchronous vertical interval source select switch for switching up to 12 inputs of composite video and balanced stereo audio signals. All synchronous inputs have vertical interval switching, and an RS232/RS422 serial control port is included. This switcher is value engineered for the best combination of price, performance, and reliability. Packaged in a 1RU housing, the 12XSV switcher is ready to rackmount or be used in stand-alone applications.