text.skipToContent text.skipToNavigation

Linksys Max-Stream AC1200 MU-MIMO Wireless USB Adapter (WUSB6400M)


This AC USB adapter instantly upgrades your Windows®-based laptop or PC/Mac to the latest Wi-Fi standard, which is 2x faster than AC600 technology. This effectively makes your laptop/PC/Mac a MU-MIMO device, thereby allowing the Wi-Fi signal in your home to be distributed more efficiently to more Wi-Fi devices for stronger overall Wi-Fi coverage.

Next-Gen AC Wi-Fi MU-MIMO technology delivers exceptional speed and performance to your Windows®/Mac-based notebook, laptop, or desktop computer. It allows you to binge watch your favorite shows, play online games, and download large files with supercharged AC Wi-Fi speeds that are 2.8 times faster than Wireless-N. MU-MIMO in Your Home

MU-MIMO in Your Home


Equipped with USB 3.0 technology, the adapter delivers speeds 10x faster than USB 2.0, helping ensure a fast and lag-free connection. The adapter is also compatible with USB 2.0 ports.


The USB adapter dramatically increases your range with its multi-directional high gain antenna.

Easily Bring MU-MIMO to Your Home


To enjoy next-gen AC Wi-Fi, simply plug the adapter into your PC's USB port or use the CD install.


This USB adapter works with all Wi-Fi routers, including your existing unit and those from Internet service providers.

Technical Specs
  • Wi-Fi Technology:
    • AC1200 MU-MIMO Dual-Band AC
    • MU-MIMO
    • Dual band 2.4 and 5GHz
  • Key Features:
    Adapter wirelessly upgrades your Windows®-based notebook computer to AC WiFi speeds with MU-MIMO
  • Network Standards:
    • 802.11ac
    • 802.11n
    • 802.11a/g
    • 802.11b
  • Wi-Fi Bands:
    Dual Band 2.4GHz and 5GHz
  • Easy Setup:
  • Minimum System Requirements:
    USB 2.0
  • Security Features:
  • Warranty and Support:
    • 1 Year US
    • 2 Year EU
Package Contents
  • Linksys AC1200 Dual-Band Wireless-AC USB Adapter, WUSB6400M
  • CD-ROM with Setup Software and Resources
  • Quick Start Guide
Rated 5 out of 5 by from Amazing Speed and Signal Strength First of all I received this product for my honest review. and i Must say im totally impressed. I have a nice laptop but it has the old wireless N and as soon as i plugged in the AC1200 adapter its was like a new computer. the speeds were equal to me hard wiring it via Ethernet. The setup was so easy plug it in sign in to your network and full bars, full link speed Also worth mentioning the adapter like no other has a hinge that allows you to fold up the antenna for even more range. I also plugged this into my Desktop and watched youtube @ 4k 60fps . mot one frame drop or lag spike!!. Great product all the way around!!
Date published: 2017-05-08
Rated 5 out of 5 by from WOW! Super Fast Wireless I received this device free from Linksys Friends and Family and I must say this is an extremely FAST wireless adapter. I stream movies from my main desktop computer to my laptop in another room wirelessly, which is then connected to my TV through an HDMI cable. There is NO buffering, No lag, NO hesitation. Previously, I was only able to do this with a wired connection. My wired connection is 100mbps. This wireless connection is 867mbps. I am thoroughly impressed with this performance. One more thing...wireless adapters usually require a driver installation disk. This is strictly plug and play on my Windows 10 setup. I love this!!!!
Date published: 2017-05-02
Rated 5 out of 5 by from Excellent boost to speed and signal I need a boost anytime I was downstairs, so I tried this USB adapter out to see how it would work. I have a Linksys 802.11AC router to go along with this adapter. I set it up on the desk top first and it was very easy to install, basically plus in and it did the rest. There was a good boost on the desk top so I thought I would try the laptop and the speeds increase was beyond expection. I went from a download speed of 11.36 to 119.07 and a upload speed of 5.46 to 5.92. I would positively recommend this product to anyone.
Date published: 2017-05-05
Rated 5 out of 5 by from Powerful & Easy NOTE: I was sent this product to evaluate. I have tried this on the 2 PC desktops I have that do not have integrated wireless WiFi. The Windows 10 system was 'plug & play' easy, just plug the device in and in a few minutes it loaded the driver and recognized my Router. When I tried it on my Win XP Pro system, it did not load the device driver automatically, I had to use the included CD. Once done, it performed exactly as the Win 10 setup. Had exceptionally strong signal 5G reception within 50ft inside the house. Even outside in our lanai it received 4-5 bars, well over 50ft away and thru multiple walls. Device is a great cost effective alternative when you cannot used Ethernet cable.
Date published: 2017-04-26
Rated 5 out of 5 by from An Excellent Product In Every Aspect The product was delivered very quickly and in perfect condition. As directed by the easy-to-follow Quick Start Guide, plugged it into a usb port on my Dell Inspiron 1525 laptop, and it was instantly recognized. I then went to Device Manager and installed the latest driver. I then connected to my router to establish a wifi connection to the internet. Everything was very quick and smooth. It stays connected as long as I want to be on the internet without interruption, and it transfers data very quickly. I am extremely pleased with this product and would highly recommend it to my friends and family.
Date published: 2017-04-29
Rated 5 out of 5 by from Tired older computer ? This Is worth a try Just finished getting this Wi-Fi adapter install on an HP laptop running Win 8.1 that's 3-4 years old . WoW , is my 1st impression . Once I figured out how to get it installed(took a bit of trial and error) I ran a Speed test to see what if any improvement I might get ... WoW is what I got .... Runs as fast as my Hard Wired desk top .... 90Mbps .... IMO , This unit solved the connection speed issues I've been trying to fix . Bought a wrt3200acm router a couple of months ago while upgrading the whole computer system. Computer ,modem, router . Now , I'm getting the speeds I should be getting . I can't rate some options as I haven't had it long enough and not tested it's distance .... I have a feeling it's all good
Date published: 2017-07-22
Rated 1 out of 5 by from Doesn't work I bought this because the wifi card in my desktop couldn't handle speeds above 150 mbps. The rep I talked with told me to buy this wifi adapter and it would provide blazing speeds (I had upgraded to Spectrum Ultra, but my internet speed barely reached 130 mpbs). Well, it arrived and I plugged it in and it failed. I rebooted my PC and tried again; same failure to load a driver. Spent a half hour with a LinkSys rep to figure out the problem and she was unable to resolve the issue. Don't waste $60 on this device especially since it can't be returrned.
Date published: 2020-08-30
Rated 4 out of 5 by from Great Distance Coverage, needs more stability. This review is for the Linksys WUSB6400M AC1200 MU-MIMO USB Wi-Fi Adapter, I was able to use this amazing little WiFi gadget in 3 computers, just for testing purposes, I used a windows 7 desktop, a windows 7 laptop and a windows 10 desktop. Now, let me state that first of all 3 of my machines are working flawlessly wired, so I decided to give this device a test, I had different experiences, these are my findings. My windows 10 desktop which is currently using an i7 6700K CPU and 16GB of RAM, and an SSD of 500GB with an Asus Z170-A mobo was my first choice to test this bad boy with, I'm currently on a 100MB D/L plan with Spectrum and 10MB U/L, when wired, my speeds are consistent with that, however, when I tried this USB adapter, my speeds downgraded to about 70MBS D/L and the upload stayed the same, no change there, I did make sure I was connected to a 3.0 USB port by the way, because this is a 3.0 Adapter after all, but anyways, I couldn't figure out why the speed decline, although I could've tried other options I just decided it wasn't a big deal since I was able to reach far, far, away SSIDs that I had never seen before and with great connection bars of up to 4 bars, pretty neat. Anyways, my windows 7 desktop which is a core 2 duo 4.0 machine, the moment I connected this adapter, it started literally flying, and I mean flying, this machine went beyond my 100MB D/L plan, it reached as far as 120MB D/L (upload stayed the same here too) and I was happy, because this machine is the one I use for work and well it just brought good speeds to my older desktop and although I was NOT connected to a 3.0 USB port I was dumbfounded how it reached those speeds, who knows, the bottom line is it worked great for my needs and I was happy. My Win 7 Laptop ran very smoothly when I attached this USB WiFi adapter too, my only grudge was that all 3 machines seemed to drop the connection at least once, randomly, but after that first disconnect and reconnect it wouldn't do it anymore, I'm sure this is a firmware fix but for now, I give it 4 stars in terms of reliability but I'm very happy with this device and I know some of you will be too. I do have have to clear up that this is my own experience, and my own testing using my own machines, I was not paid to do this review, I was asked to write an unbiased review in exchange for the product which is what I'm doing, I'm a consumer too and I like keeping things honest, thank you.
Date published: 2017-04-30
  • y_2020, m_10, d_22, h_17
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_49
  • loc_en_US, sid_P-WUSB6400M, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_linksys
  • bvseo_sdk, java_sdk, bvseo-
  • CLOUD, getReviews, 31ms
*Maximum performance derived from IEEE Standard 802.11ac draft specifications. Actual performance can vary, including lower wireless network capacity, data throughput rate, range, and coverage. Performance depends upon many factors, conditions and variables, including distance from the access point, volume of network traffic, building materials and construction, operating system used, mix of wireless products used, interference, and other adverse conditions. An 802.11ac router or access point will be needed to achieve 802.11ac performance.
†Three or more 1x1 MU-MIMO-enabled client devices must be connected to achieve the three (3) times faster physical data rate.