This is a "console cable" used for configuring network devices such as Cisco routers. ⇒ "72-3383-01 REV.A1" It's a genuine Cisco product, but can be used with routers from other manufacturers (Nokia, etc.) as long as the specifications match. This is a set of 4, unused (unopened) cables. One end is a 9-pin (DB9), and the other end is RJ45. Since many recent PCs don't have serial interfaces, please prepare a separate USB-to-serial conversion cable. #Cisco #Cisco