Package: You will get 2pcs DB9 serial splitter cable. Split a DB9 9 pin female connector into two DB9 9 pin male connectors. This is an ideal and cost-effective way to connect two DB9 RS-232 serial peripherals to a PC source. With high compatibility it can meet the needs of notebooks and desktops to connect to serial computers digital machine tools set-top boxes industrial instruments etc. This cable's fully molded connector with thumbscrews can provide you with a quick and convenient connection every time. Just loosen the screw to disconnect then connect and tighten firmly to make the connection. It is recommended not to insert or unplug a serial port while it is energized. When inserting or unplugging the serial port at least one end should be cut off otherwise the serial port may be easily damaged.