Simple Null Modem Cable: Transfer data between two devices using a serial communication protocol If your equipment require three wire null modem cable (TX, RX and GND), take this 15-foot 9 pin serial port cable adapter wherever you need it, it allows you to add your peripherals to an application or replace the cables. This 9 pin serial cable female to female is with gold plated pins for superior corrosion resistance ensuring a solid connection. For RS232 devices below (partial): Telescope vinyl cutting machine Modem GPS network equipment radio transceiver stereo system subwoofer/speaker set sewing machine weather station Or controller to a remote control camera ... Important Note: 1.Shielded with standard Foil-Al layer shielding as most cables do, it fits for most of jobs. 2.It’s not a 15 pin VGA cable that connects monitor to laptop, is only for RS 232 communication port to interface one system to another system. Item Specifications: Connectors: DB9 to DB9 (Female-Female) Interface Surface: Nickel-plated Pins Surface: Gold-plated Wire Gauge: 30 AWG Cable Length: 15 Feet Cord Diameter: 6mm Color: Black What’s Included: 1 x 15 ft Serial Cable (Female to Female) 1 x User Manual