Well, it's an Extension Cable for the NES and SNES Classic mini-consoles. Why Nintendo ever thought 3-feet was long enough for the NES Classic, I'll never know (although I sometimes wonder if it was to get rid of excess Wii Nunchuk controller cables, since both use the same connector). This extension cable effectively remedies that first-party feax pas, effectively giving you 9 feet of extended controller cable to work with. The 5-foot SNES Classic controller cables aren't quite as short, but 5-feet really isn't ideal for couch gaming unless your console is sitting in the middle of your living room (not under your TV), so these will remedy that as well.
The cables look to be well-made and I've had no issues with the latches not wanting to release when trying to take them out of the console (something I have experience with a lot of third-party Nunchuk controllers releasing from the Wiimote ports). If 3-feet or 5-feet of controller cable length isn't long enough for you (and of course it isn't), this is an inexpensive way to fix the problem.
If you need added length to you SNES classic controllers and would rather have a longer cord than going wireless (especially if you game a lot like my son and batteries die quickly so wired is the best way to go) this is a great solution. It works great with the original SNES controllers. However, we have two generic SNES controllers as well. This works with one of the brands but not the other for some reason. It doesn't affect game play at all and adds a nice 6 feet to your cable length. I wish they would have made it even longer (10 feet total) so my son could play more easily from the head of his bed (his bedroom is on the large size) but at least he can sit on the end of his bed when using these cords or move his gaming chair to where he wants it without worrying about being too "tethered" to his console. He was worried it would affect the response of the controllers but they do not. They seem sturdy and well made. Definitely worth it if you want to add another 6 feet to your cable length.
If you are using the included controllers for the SNES or especially the NES classic, you need to get these extenders. There is no input lag, they are high quality and they are easy to attach and detach. They add significantly more usability to your controllers in today's modern living room and for the modern gamer who is used to having wireless controllers. Since most of our tv's these days are set up to be sitting as close as we used to be these extenders allow you to sit further back from modern larger televisions.
This is a basic bit of kit with limited demands, but it works well. The length is just about enough (more so for the SNES Classic, as it starts with a longer cable), but it isn't exactly over the top (just barely enough for NES Classic). The connectors are sound and really seem every bit as good as the OG Nintendo ones. I leave them on all the time, so I'm not really privy to any durability insights. The cables themselves have taken some bumps and work every bit as well as when I got them. That's a great thing, as they work great.
This is what you need if you aren't an 8 year old sitting in front of an old tube TV. The NES Classic controllers cord are sturdily short and make no sense. Most people have 32 inch or larger TVs so you have to sit a minimum distance away to see properly. These extension cords are exactly what I needed and they worked perfect with the SNES and NES Classics. You just connect this cord into the port of the Classic and then the controllers into this. I experienced no lag or input problems and they worked exactly like they do plugged in direct. They are solidly built and thick feeling. I would highly recommend getting one of these if you don't have a cordless option.
I needed the extra length for my NES and SNES Classic consoles so badly - I hate that Nintendo only gave us 3ft of cord length. These extension cables are 6ft so now you have 9ft of controller cable length... way better than sitting 3ft from the console and that close to your tv. The cable is really well made, must be extremely durable if we haven't destroyed them yet. These work really well and I have not had any problems with them - great, inexpensive way to lengthen your controller cables!!
Essential equipment for Nintendo's SNES or NES Classic. These extend the length of the too-short cables with standard console controllers by another 6 feet. This makes them usable with the TV set arrangement that most people have. It is hard to imagine what Nintendo was thinking with the original controller length - perhaps to reduce clutter? In any case, these are well made and connect firmly. These are a cheaper solution than buying wireless controllers. Overall, they work well and are recommended.