Converts a DB9 RS232 serial port into two DB9 serial ports or use it as a DB9 video splitter. It allows two serial devices to connect to any PC with a DB9 serial port. Supports all RS232 serial devices such as printers, mouse, modems, PDAs, & digital cameras with DB9 port. Use a #CC312AF DB9 Female to DB25 Male Adaptor for DB25 devices. Note: Connected serial devices can only be used one at a time. (Pin-out: Straight-Thru; Connectors: DB9 Female to 2 Male)