Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Can this connect a Cat5 cable to a RJ45?
Document: The product works great. Allowed me to connect two lengths of Cat5 cable just fine. No problems. Also, the vendor delivered the product very quickly with no issues. I would buy this product and use this vendor again.
These barrels for cat5 do exactly what they say they do. They allow you to extend a cat5 cable just a bit more.
I needed to extend a network cable another 15 feet... so I bought bought a 15 foot cat5 cable and connected the two cables with this. Could not have been easier.
I got this not for network use but for extending a mic cable going to a communication transmitter. The mic hookup on it uses the same RJ45 connectors used in network cable. Just just a hint these have other uses besides network cable extenders.
and done. This is a very simple device that works perfectly. I used it to connect two shorter Ethernet cables together to make one longer cable.
I had a cat5 cable that was about 1 foot too short to do what I needed. It was already in place and I did not want to run a new one so I got this and added a few feet to it. Truth is thought that now you can buy a 50 ft cable cheaper than you can buy this so it may be better to buy a longer cable. Depends on your need is, but this is exactly what I needed it to be.
This was a great price for this coupler. It allows me to connect 2 Ethernet cables and works great. I would not suggest using these for permanent installations, run a longer cable for that, but for setting up a demo or for a quick presentation where you need a couple extra feet it works great.
Was setting up my Mac mini to replace my old IBM desktop (which sat on the floor) and oops noticed that the RJ45 cable was about 4 feet too short to reach onto the desk and plug into the back of the Mac Mini.This coupler works as described. Worth every penny - showing megabit data flow as well.Hope this review helps!
It performed as advertised and I received it in a timely manner. It was easy to use and the cables fit snug in each end, It coupled two cat5 cables in my house wiring allowing me to locate a wired printer and wireless router in two locations in my home.
I use this to connect two 10foot Ethernet cords, so far I haven't noticed any difference in signal strength or speed in comparison to a fiber-optic 25 footer.
Answer: It joins two Ethernet cables, CAT5, that have RJ45 connectors attached.