This is cable combo pack. Where you gets two cables which are useful for downloading the software in Set Top Box. These two cables are as follows,
(1) 3 Mini PIN RS232 To 9 PIN RS232 Cable
(2) 9 PIN RS232 To USB Cable
So that both of these cable can be used simultaneously.
If your laptop is not having RS232 port then you can connect with USB cable by using this cable combo pack.