StarTech.com 3.3 F/F DB9 RS232 Serial null modem black cable is suitable to transfer your files directly from PC to PC. Connects your serial devices conveniently. StarTech.com 3.3 DB9 RS232 Serial F/F null modem cable in black color features two DB9 female connectors to connect a serial device to a 9-pin serial port. Prevent EMI interference with the cables high-quality shielding. Provides a reliable, long-lasting connection with the strain relief nickel plated connectors. PVC jacket and aluminum-Mylar foil with drain shielding offers enhanced durability. Modem cable transfers files directly from PC to PC via a serial connection. 3.3 Long for convenient usage. Comes with one 9-pin DB-9 female RS-232 serial connector on 1st end one 9-pin DB-9 female RS-232 serial connector on 2nd end for easy connection. Comes in black color for an attractive look. Copper conductor for efficient transmission. Nickel plated connector for efficient transmission.