AYA 6Ft (6 Feet) DB9 Serial RS-232 Male to Female Straight-Through Extension Cable Connectors: DB9 Male to DB9 Female Fully molded connectors with thumbscrews, Fully shielded All lines wired straight through Fully shielded to prevent unwanted EMI/RFI interference DB9 serial cable is used to connect PC and device with DB9 serial port.