AC1200 USB Wi-Fi Adapter Round-Up


While ZyXEL has a solid presence in the consumer market, the company's designs often reflect industrial roots. Its fastest AC1200 USB Wi-Fi adapter is the AC240, featuring a flip-up antenna and a USB extension cable to optimize signal strength.

Figure 19 - ZyXEL AC240 Wi-Fi USB adapter. Note that the flip-up antenna is not deployed in this image.


  • AC1200, up to 300 Mb/s on 2.4GHz and 867 Mb/s on 5GHz bands
  • USB 3.0, backward compatible with USB 2.0
  • Flip-up antenna
  • Supports 802.11ac, 802.11n, 802.11g and 802.11a

What’s in the Box?

Figure 20 - Outside box of the ZyXEL AC240.

Included in the box are:

  • ZyXEL AC240 USB Wi-Fi adapter
  • Quick-start guide
  • Software CD
  • USB extension cable

Figure 21 - The contents of the box of the ZyXEL AC240 Wi-Fi adapter. Note the USB extension cable.


ZyXEL's AC240 features a flip-up antenna to improve your connection to the router as much as possible. There is a single green status LED and a WPS button on the adapter.


Figure 22 - The ZyXEL AC240 seen with the WPS button and the antenna raised. Note the ventilation slots on the side.

The AC240 is one of two Wi-Fi adapters we tested with a flip-up antenna, Netgear's A6210 being the other. By getting the antenna away from the adapter, it theoretically decreases electrical interference.

There are reports that ZyXEL's AC240 is actually a re-branded Edimax AC1200 Wi-Fi adapter. While I cannot confirm this, it does look identical except that the Edimax uses a white chassis.

General Observations

The included CD features a manual in PDF form. There is also a section for Utilities," though it only contains an installer for Acrobat Reader.

The upright antenna did not seem to offer a stronger signal when it was raised or lowered, though it did increase the likelihood of having the AC240 knocked out of a USB port.

Figure 23 - Anatomy of the ZyXEL AC240

1: USB 3.0 connector
2: WPS button
3: LED
4: RTL8812AU
5: 5G PAx2 + 5G LNAx2
6: I-PEX cable
7: Dual-band PCB antenna and PIFA antenna

The Planar Inverted F-Antenna (PIFA) is common in the mobile phone market. If you look carefully, it looks like the letter "F," hence the name. This type of antenna is known for a slim profile and omnidirectional pattern.


Figure 24 - The screenshot of the ZyXEL "software." It really is the Windows software, and it provides much of the same info that the other software solutions provide.

ZyXEL's installation process is one of the longest; the driver alone was 100MB. What left me puzzled was that the Wi-Fi settings were still managed by Windows, and not a separate configuration utility. Despite the vanilla approach, ZyXEL's driver remained stable throughout testing. We used version in our review.


The AC240 has a list price of $70. The street price is $56.04 on, and ZyXEL includes a two-year warranty.

Jonas DeMuro
Freelance Reviewer

Jonas P. DeMuro is a freelance reviewer covering wireless networking hardware.

  • SamSerious
    For notebooks these sticks look great, but as great as a flip-up antenna may be compared to the slim sticks, they will never be as good as those porducts where you can put a big omnidiretional antenna on. Therefore for users with bigger desktop computers, a PCIe adapter with multiple swapable antennas is still the way to go.
  • Math Geek
    did not take me long to realize that a usb stick on the back of a pc under a desk surrounded by a massive bundle of various cables was not the optimal way to go about wifi on a pc :)

    i always get the stick up in the air and away from the pc and easily see double the performance this way. can't tell you how many times i went to a client's house to see about wifi problems and fixed all the problems by simply putting the usb stick on an extension cable and taping it to the wall above the pc. BOOM instant signal and throughput gain.

    as a result i look for internal cards with antennas on cables i can raise up or usb sticks that come with extension cables. just my personal experience anyway.
  • tb75252
    Do any of these products work under major Linux distros?
  • gangrel
    Math Geek: yes! It applies to any kind of wireless. I like Logitech keyboard/mouse because the Microsoft transceivers have been far more problematic, and I greatly prefer wireless. Shifting that away from the chassis is helpful...and having it too near a WiFi antenna does increase problems.

    tb7: check the manufacturers' pages to see if they're showing Linux drivers, at least as a first step. Not, as I think you know, that this guarantees they'll work. But it'll be a heckuva lot faster for you to do the research, than to wait on the chance that someone here has done it. Better chance is to skip USB and go PCI; for whatever reason, PCI network cards install much more often, and more easily.
  • Math Geek
    here's another thought since am actually in the middle of trying to figure this out. i wonder if the writer of this article knows a bit more about the features on these dongles?

    my lg phone is very easy to connect to my roku stick using the miracast feature. win 8.1 had this as a beta feature and i was able to use it on my laptop. win 10 has finished this feature and it is now built into windows. sadly, the finalized version does not work on my laptop like it did on win 8.1. best i can tell is that the wifi card is too old and does not support the finalized feature. i can get over that as the laptop is a few years old.

    i would also like my desktop to connect the same way but my even older wifi dongle (n rated one) on my pc does not support it either. i can't find anything in any feature list for any brand wifi stick that says it supports the wifidirect standard that miracast uses.

    does anyone know how/where it is listed or is it safe to assume it is there for any newer dongle i buy. i was going to try my luck and get a new ac model assuming it would be new enough to have it supported but would rather not play the guessing game with multiple models if it is not going to be universally supported. i can't find a list of supported hardware online nor any reference to wifidirect on any info sheet anywhere. :(

    anyone know anything about this as it would be nice to wirelessly share my pc with my roku stick in another room. my phone does this no problem and it is a cheap model so this is not exactly a high end feature just one that lg supports very well.

    note: wifidirect/miracast is not the same thing as the dlna that some other options use. i have no interest in buying a chromecast stick or anything else other than a new wifi stick. i want to use the roku stick i already have and use daily. :)
  • gangrel
    Look here:

    Not many right now.

    Readiing here:

    the problem would appear to be, that router support is required, and may not be all that common. That suggests support in adapters will be slow.
  • Math Geek
    16724138 said:
    Look here:

    i have been on that site and played with the search feature but was not able to get this subcategory. i only found a bunch of monitors and routers that worked :(

    but hey thanks. now maybe i can finally figure out what i need to buy. book marking that search so i can find it again :D
  • dstarr3
    For notebooks these sticks look great, but as great as a flip-up antenna may be compared to the slim sticks, they will never be as good as those porducts where you can put a big omnidiretional antenna on. Therefore for users with bigger desktop computers, a PCIe adapter with multiple swapable antennas is still the way to go.

    Well, I'm building a mini-ITX build for the living room, and the only PCIe slot will be consumed by the GPU. There are motherboards with WiFi built in, but there are better boards that don't. So, this is a very good solution for those kinds of builds, as well.
  • gangrel
    Math: check the Broadcom blurb I posted a bit late. :)
  • Math Geek
    16724213 said:
    Math: check the Broadcom blurb I posted a bit late. :)

    interesting article but that goes against what i thought wifidirect/miracast does. the feature uses the wifi cards in both devices to make a direct connection and pass data between them. a router should not come into play here. i think the article is saying the router will able to connect through miracast and then anything connected to the router will be able to use the data. at least this is how i read it :)

    for instance just for giggles last time i was in sam's club i connected my phone to one of the lg tv's (miracast actually recognized about 10 different ones i could connect to) and mirrored my screen to the oohs and aaahhhhhs of the other shoppers who did not now they could do this. now this was done without any wifi connection at all. i was not on the store network and the tv was connected to none either. a couple other shoppers pulled out their phones and in a few minutes of showing them where the settings were, we had about 6 screen going with our phones mirrored.

    this is why i read the article the way i do, since i know no actual wifi is needed, only compatible wifi cards. this is how it kills latency and such by being a direct connection between the devices with no middle man. it really is a neat feature and once it takes off, we'll all wonder how we lived without it. i watch movies from my phone to my tv all the time since it is easy to do and much easier than connecting my pc to my tv in the other room. hence my wish for a wifi dongle that works so i can do this from my pc and save my phone battery some :)