Attach virtually any existing external modem with a DB25 female serial port to the serial DB9 port on your computer. Featuring oversized ergonomic thumbscrews for easy installation. PRODUCT FEATURES: 24K gold plated copper connectors provide maximum conductivity, with no data loss; Fastest data transfer for maximum performance; Oversized ergonomic thumbscrews make installation a breeze; Molded strain relief ensures a lifetime of error-free data transfer; Gold plated copper contacts provide maximum conductivity, with no data loss; Flextec cable jacket is very durable and extremely flexible for use in tight areas; Ground indents provide excellent conductivity and retention with mating conductors; PVC premold encapsulates individual conductors to ensure electrical isolation and relieve stress; Aluminum undermold shield helps to meet FCC requirements on EMI/RFI interference; 28 AWG stranded tinned copper conductors are individually insulated in polypropylene to minimize cross talk, ensuring high-speed, error-free transmission.