This adapter will extend connect a DB9 cable to a DB9 cable and vice versa while maintaining whatever pin-out was on your original cable. Used for serial peripheral devices like keyboards, mice, joysticks, etc. Fully shielded to prevent unwanted noise. Straight Through Pin Setup. Each order Contains 1PC (One Piece). Picture demonstrated adapter's front and back connection. Standards: UL, CSA, ISO 9001:2000 manufacturer