10Ft (10 Feet) DB9 Female to DB25 Male AT Serial Modem Cable with Thumbscrews Connectors: DB9 (9 Pin) Female to DB25 (25 Pin) Male Fully molded and foil shielded to protect against EMI/RFI interference Connect a PC computer to an external modem via the DB9 serial port. Ground indents provide excellent conductivity and retention with mating conductors Oversized ergonomic thumbscrews make installation a breeze 1 Year Warranty