DB9(NOT VGA-15 Pin) Female to Male: With standard DB9 female connector for one end and standard DB9 male connector for the other end, serial null modem cable (3 wire type and no hardware handshaking) connects your computer to device with COM port RS-232 compatible interface. | 2, 3 TX and RX Cross: Pin 2(RX) and pin 3(TX) are cross connection, while 1, 4, 5, 6, 7, 8, 9 and G Pins are wired straight through, with the order by 1-1, 2-3(RX-TX), 3-2(TX-RX), 4-4, 5-5, 6-6, 7-7, 8-8, 9-9, G-G. | Stable Connection: 28AWG pure copper conductor and gold-plated connector provide smooth connection basic, while metal braiding and AL-foil shielding structure can prevent external interference for safe and stable connection. | Durabe Desigh: XANHAM DB9 null modem cable are all produce through two times injection molding(internal molding and outer molding) which can maintain a more stable structure with cable and connectors. Cable are UL Listed with VW-1 fire resisitance for using safety both in-wall and out-wall. | Compatibility: It is widly use for computer connecting to the equipment with DB9 connector for null modem data communication like scanner, Modem, printer, plotter, switches, camera, barcode / embroidery machine, touchscreen, microcontroller, test equipment.