RS-232 Serial Extension Cable DB25 Male to Female 3ft 3 foot DB-25 (M) DB-25 (F) RS-232 Serial Extension Cable RS-232 is a data signal standard used in many computer serial ports for connection between computers and computer peripherals such as modems and teletypewriters. If you have computers/devices that use RS-232, these cables are basic essentials for your system. Using these cables, you can enjoy high-fidelity and high-speed data transfer rates that only superior cables can deliver. Typical Applications: Connecting between computers and computer peripherals. Extending RS-232 serial connections. DB-25 Extension Cable, Male to Female DB-25 Connector Male to Female 3 feet long CCA