Useflul when you need to supply power to a POE device
596517
I use this switch connect various ethernet devices and to supply power to a&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/GW-Security-5-Megapixel-2592-x-1920-Pixel-Super-HD-1920P-Outdoor-Indoor-Network-PoE-Power-Over-Ethernet-1080P-Security-IP-Camera-with-2-8-12mm-Varifocal-Zoom-Len/dp/B01N7IBB86/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">GW Security 5 Megapixel 2592 x 1920 Pixel Super HD 1920P Outdoor Indoor Network PoE Power Over Ethernet 1080P Security IP Camera with 2.8-12mm Varifocal Zoom Len</a>.  It works well for this purpose and doesn't make any noise.
2972467
I got this to simplify wiring for a bunch of UBNT devices and cameras I have, and it works perfectly. A lot cheaper option than buying a PoE switch and especially good for Ubiquity devices that have non-standard voltage requirements.
182570
Cool switch. I use it to power some fluorescent lights in the garage. I just wish the outlet end had more than 1 plug.
860996
Don't work as expected due to voltage drop. Some equipment detect this voltage drop and deny the POE pass through.
1232391
No small print if you have a POE switch plug it in and it works
Works great with ISPY some other IP cams I purchased recently have issues with video corruption
I love the fact that when they say POE they mean POE no splitter /injector required

only slight drawback is the mounting bracket is cheap pot metal and looks like it may be brittle
1552795
Wish it was natively 802.3 af or at compatible so it would work with their lower-end 802.3at switches, but requires their proprietary power system. Does come with the POE injector, or you can acquire the INS-3AF adapter to use inline.
2494663
These devices are the best... you will require additional power blocks if you are not using a POE switch
Use this power block to power the devices POE-48-24W-G. I made the mistake and bought the 24v 0.5A version, which does not power this device.
1861749
Just plug and go.  I used this with an Aquascape 3 way splitter and a 6 watt transformer.  Couldn't be happier with the results.
4049195
Make sure you buy an 802.3at injector if you decide to go POE.  An 802.3af will NOT supply enough power for consistent operations.
The injector that is pictured that others buy with this is the wrong injector!
2087139
Mistakenly purchase a passive PoE adapter first but after a little more research, I stumbled on this one. It works perfectly with Pi2 and Pi3 on my Cisco 2960x. Would highly recommend to get rid of the wall wart and clean up an installation. Can't say enough good about it.
3594665
must have if you use Unifi cameras. This switch does provide the "passive 24V PoE" that Unifi cameras require. Also provides standard PoE for other devices. Easily configured with Unifi app (but you need it). Very much recommended if you run a lot of Unifi equipment. Not recommended if this is your only Unifi piece of equipment as you will have to run the unifi software just for it.
4754403
This does exactly what you want.  Plug it into any outlet and it will tell you if power is running.
2284134
Silently powering 3 IP POE cameras and an Ubiquiti Unifi AC-AP Pro. Works great and have not had any issues with it. I do wish the status lights were on the ports, not on the front, which would make it easier to check the status at a glance, since I'm not using this in a rack and desktop setup.
4757205
Works wonderfully when you need that boost of power to tide you over until you can get to an outlet.
2268208
The other reviewers have it right. It's a great and simple product that delivers very good performance! I also love the aesthetics of the device.

It's also awesome that this device is PoE compatable. I'm using this TP-LINK PoE injector (<a data-hook="product-link-linked" class="a-link-normal" href="/TP-LINK-TL-PoE150S-Gigabit-PoE-Injector-Adapter-IEEE-802-3af-compliant-Up-to-100-meters-328-Feet/dp/B001PS9E5I/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">TP-LINK TL-PoE150S Gigabit PoE Injector Adapter, IEEE 802.3af compliant, Up to 100 meters (328 Feet)</a>) and everything is working perfectly.
2001117
Most of the negative reviews seem to center on people trying to use these in conjunction with dedicated PoE devices (injectors or end-devices).  This is most useful for cheating a single cable installation for a device which normally would require a wall-wart power adapter nearby.  Anyone planning a long cable run or high current draw needs to be realistic about the power losses to be expected over such small gauge wires.
3451449
This thing is very cool, feature packed router . It gets lil warm but it works without and issue so far . Will definitely recommend
Using it with POE