this will work great if you don't have a 4 port keystone
597461
i had to cut off the tabs on the side in order to get other keystone items next to this.  this will work great if you don't have a 4 port keystone.
557802
I bought these in order to terminate a Cat5e Ethernet cable--and then insert the Keystone Jacks into Keystone wall plates.  Beware---They DO NOT work with stranded Ethernet cable--and there's nothing in the sales info to tell you this.  They **might** work with solid copper core Ethernet--don't know--but they're still very cumbersome as the other reviewer noted. A better solution if you're trying to connect Ethernet to a wall-plate is to use a Keystone "pass-through" jack--which has the RJ-45 female socket on both sides of an in-line connector-- which then snaps into the Keystone wall plate.  That way you can use cable that's already terminated with the standard RJ-45 plug--and it's literally "plug and play" - so much easier and fool-proof!
1687729
This is not pinned for std POE so if you just want to break out power drives from a switch or a multi-port injector this will not work. It will not negotiate power with a smart switch and the switch will not send power to this device
1435307
This is a handy device to add another wired GbE port to a device that only has room for a wifi card. The caveat is that this needs realtek drivers which for some OSs and hypervisors is plug and play, have run into some bios/motherboard/hypervisor combos where some plug and pray is needed beyond simply loading a driver...
2016685
I bought this to have a couple dedicated regulated outlets for lower pressure needs plus a couple unregulated lines. I still have one unused port if I want to add something in the future. I did switch out the large supply line port to use 3/8" hose as I don't need a lot of volume since I'll only use one line at a time.
467658
Be forewarned as other reviewers will tell you these will NOT accommodate MANY of the keystone products out there. These are specific for Leviton Quickport devices only. Unfortunately, Leviton has a somewhat limited selection, especially for the home theatre and AV markets. Be advised that many of the products from monoprice and others will not fit horizontally. In Leviton's defense in order to fit 6 ports within a decora plate the spacing must ber very thin, and even other 6 port decora plates will likely cause fitment issues. If you need 6 or more ports you are best to use a 2 gang low volt box and a single plate cover like this http://amazon.com/gp/product/B004FUYYWG/ref=ox_sc_act_title_3?ie=UTF8&psc=1&smid=A3ONFTWS4FHJKT. Because this plate does not need to conform to the decora plate dimension, there is more space horizontally between jacks. Of course if you have run 3,4 or 5 gang boxes in an effort to simplify your installation, you are going to have a problem. There are a few 3 gang plates, but the only had 12 ports, not 18. I have not seen a 4 gang single plate cover. Keep this in mind when laying out your installation! Hopefully I can save someone the pain of assuming in advance that these 6 port jacks will fit. Keep in mind that the same problem also holds true to the 4 port decora plates as well- as the same Horizontal spacing issues come in to play.

My 3 star review is based on the fact that Leviton makes no mention of this in the product description.
2237830
Bought this to replace my male-to-male cable and female-female keystone adapter, which I mistakenly believed were somehow changing the internal wiring (they weren't - there was a broken wire elsewhere). But so long as I had it and had installed it, I kept the Tripp Lite installed and it works fine, without having to worry about the plug inside the wall coming loose.

One star off because the keystone connector is massive; when it is installed, the retaining clip is already 80% of the way compressed inside the keystone, making removal a challenge. I had to squeeze it with a slip-pliers to compress the clip enough to work it out of the keystone in order to remove it. Of course, you're probably not planning on removing it anyway so a minor complaint overall.
2787068
I have an Internet wifi router from my provider that is also a 4 port switch. I needed 5 ports after adding a Roku XS and WDTV Live to my network. I bought this switch because it was cheap and small. I connected my router to a port on this switch (any port will work) and then my two computers, bluray player, Roku, and WDTV Live and all connect to each other and the internet. I needed an extra Cat 5e Ethernet cable to connect this switch to my router but otherwise all my existing cables worked.

5/5 stars because it worked out of the box without any hassle or configuration.
1148829
This hub works very well, but cannot drive more than one high power device, even with the power supply. It is a great way to increase your usb capacity and not have a power loss though.
1421096
This is made for Leviton's way-overpriced "QuickPort" keystone connectors, and at least for cat5/6 these are thinner (less wide) than a lot of others, specially the cheap ones sold by Monoprice.

Luckily I discovered that the Shaxon (Shaxon BM703W810 - available on Amazon and at Fry's Electronics) cat6 (and presumably cat5) connectors are thin enough, and while they aren't as cheap as the Monoprice ones (around $2.50 each vs $1.50) they aren't nearly as expensive as Leviton's $6-8 Quickports. The Shaxon connectors also lock in solid compaired to the Monoprice ones.

Other than that, this is a great unit for you SMC, and a far cheaper method of terminating cat5/6 than using Leviton's cat5/6 specific brackets, even if you add in the cost for the connectors.
2035930
I bet this is good, but I didn't have enough power connectors to run it.  Had to exchange.
3922815
I am using this with a 12 v 16 port  unmanaged switch running at 750ma and it works great.  I first used this to with a trendnet "refurb" injector but it did not work.  I switched to another injector and now this works fine!
187336
Very easy to install and works great for the 12-hole double-gang keystone wallplates I'm using. Just note that you'll probably want to score the drywall a bit around the outer perimeter and peel off any paint and scrape off some of the paper if necessary so that it'll be recessed in a bit and flush with the wall. I also had to slice off those little bumps on the side to get the wallplate to go in all the way.
1277429
Perfect, but didn't use it as a 3 way switch.
1147479
Works exactly as expected.

An important caveat, however: If you plug a 4-port (or other) HUB into it, and use this device to act as a switcher for the entire hub, it won't work reliably if there are too many high-power-consumption devices plugged into the hub.
3725489
Bought this to use with my PC and PS4. It's noted in the instructions, however, that you need three inputs to power the product when using a PS4. Unfortunately, I didn't have another HDMI input so I returned the item. Just make sure that if you're using this to switch with a PS4, that you have three inputs to plug in.
4911575
The power adapter I received has a different form factor than the one shown in the photo.  Mine has the prongs rotated 90 degrees (see my customer image), so in a power strip it blocks the adjacent outlet, unless you use the last outlet in the strip.  If the prongs were as shown in the manufacturer's picture, this would not be a problem and you could use all outlets without any problem.

Aside the form factor mix-up, this adapter seems to function fine.  It is lightweight, without the heavy "transformer brick" of similar 12V/1A adapters.