DB9 serial cable is used to connect PC and device with DB9 serial port. Male to Female cable is typically used to extend your existing male to Male cable.

Conntectors: DB9 Male to DB9 Female
Support serial printer, mouse, modem, switch, video splitter, mono & multisync video applications.
Fully shielded to prevent unwanted EMI/RFI interference.
Fully molded connectors with thumbscrew provide you with a quick and easy connection.
All 9 connector pins are wired straight through.
Pin-Out: 1-1 / 2-2 / 3-3 / 4-4 / 5-5 / 6-6 / 7-7 / 8-8 / 9-9 / G-G.
Gauge: 28 AWG
Length: 10ft

Visit: https://www.sfcable.com/10ft-db9-m-f-9c-serial-straight-thru-extension-cable-black.html