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  • TP-LINK TL-WN821N Wireless N300 USB Adapter, 300Mbps, w/WPS Button IEEE 802.1b/g/n, WEP, WPA/WPA2
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TP-LINK TL-WN821N Wireless N300 USB Adapter, 300Mbps, w/WPS Button IEEE 802.1b/g/n, WEP, WPA/WPA2

by TP-Link
| 22 answered questions

List Price: $39.99
Price: $17.17 & FREE Shipping on orders over $35. Details
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In Stock.
Ships from and sold by Amazon.com in easy-to-open packaging. Gift-wrap available.
  • Provides two methods of operation: Infrastructure and Ad-Hoc Adopts MIMO technology for wireless rates of up to 300Mbps
  • Standards: IEEE 802.11n, IEEE 802.11g, IEEE 802.11b, CSMA/CA with ACK Interface: USB2.0
  • Antenna Type: Internal Omni-directional Antennas Wireless Speed:802.11n: Up to 300Mbps(dynamic) 802.11g: Up to 54Mbps(dynamic)
  • 802.11b: Up to 11Mbps(dynamic) Frequency Range: 2.4~2.4835GHz
  • Wireless Transmit Power: 20dBm(MAX EIRP) Modulation Technology: OFDM/CCK/16-QAM/64-QAM
  • 54M: -68dBm@10% PER 11M: -85dBm@8% PER 6M: -88dBm@10% PER 1M: -90dBm@8% PER
  • Receiver Sensitivity:270M: -68dBm@10% PER 130M: -68dBm@10% PER 108M: -68dBm@10% PER
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$17.17 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com in easy-to-open packaging. Gift-wrap available.

Frequently Bought Together

TP-LINK TL-WN821N Wireless N300 USB Adapter, 300Mbps, w/WPS Button IEEE 802.1b/g/n, WEP, WPA/WPA2 + TP-LINK TL-WR841N Wireless N300 Home Router, 300Mpbs, IP QoS, WPS Button
Price for both: $37.16

Buy the selected items together

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Product Description

Product Description

TP-Link TL-WN821N 300Mbps Wireless N USB Adapter & Infrastructure and Ad-Hoc Adopts MIMO technology for wireless rates of up to 300Mbps

From the Manufacturer

Experience interruption-free performance and exceptional data transfer speeds with the TL-WN821N 300 Mbps Wireless-N USB Adapter from TP-LINK. This USB network adapter enables you to add wireless Internet connectivity to your notebook or desktop computer or upgrade its connectivity. MIMO technology, along with internal intelligent antennas, combine to deliver wireless transmission rates of up to 300 Mbps and exceptional stability.

callout top with logo
TL-WN821N 300Mbps Wireless-N USB Adapter
At a Glance:
  • Wireless transmission speeds of up to 300 Mbps
  • MIMO technology for improved transmission rates and stability
  • Quick Secure Setup function to ensure wireless network security
  • Compliance with 802.11b/g/n standards
  • Two-year warranty
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TP-LINK TL-WN821N 300Mbps Wireless-N USB Adapter Product Shot
MIMO technology improves transmission rate and signal stability. View larger.
TP-LINK TL-WN821N 300Mbps Wireless-N USB Adapter Product Shot
The small adapter easily fits in your pocket and has a cap to protect the USB connector. View larger.
Exceptional Performance and Stability with MIMO
The Wireless-N USB Adapter offers wireless transmission speeds of up to 300 Mbps and complies with IEEE 802.11b/g/n standards. MIMO (Multi Input Multi Output) technology and internal intelligent antennas deliver stronger signal penetration strength and wider wireless coverage.

Worry-Free Wireless Security
This product's QSS (Quick Secure Setup) function complies with the WPS standard to ensure the security of your wireless network. The Wireless-N USB Adapter supports 64/128-bit WEP encryption, as well as WPA/WPA2 and WPA-PSK/WPA2-PSK encryption and mechanisms. These combined security measures are designed to deliver stronger, safer protection and guard against intruders.

Product and Warranty Information
The Wireless-N USB Adapter measures 1/2 by 3-2/5 by 1 inches (H x W x D) and is supported by Windows 2000, Windows XP, Windows Vista, and Windows 7. It is compatible with other 802.11b/g/n protocol wireless products, as well as Intel Centrino technology.

The Wireless-N USB Adapter is backed by a two-year warranty.

What's in the Box
Wireless-N USB Adapter, quick setup guide, USB cable, and resource CD.


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SPEEDUp to 300Mbps Wireless-NUp to 300Mbps Wireless-NUp to 150Mbps Wireless-NUp to 150Mbps Wireless-NUp to 150Mbps Wireless-NUp to 150Mbps Wireless-N
CONNECTION TYPEMini USB 2.0USB 2.0Mini USB 2.0USB 2.0USB 2.0USB 2.0
ANTENNAS2 OmnidirectionalOn-BoardDetachable OmnidirectionalDetachable OmnidirectionalOn-BoardOn-Board
MIMO TECHNOLOGY check mark   check mark
HIGH GAIN ANTENNAcheck mark

(2 x 3dBi)
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(1 x 5dBi)
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(1 x 4dBi)
  
QSS ONE TOUCH WIRELESS SECURITYcheck markcheck markcheck markcheck markcheck markcheck mark
INTERNET PHONE CALLSBestBestBetterBetterGoodGood
VIDEO STREAMINGBestBestBetterBetterGoodGood
ONLINE GAMINGBestBestBetterBetterGoodGood


Product Details

  • Product Dimensions: 0.5 x 1 x 3.4 inches ; 4.8 ounces
  • Shipping Weight: 5 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B002T4D3M2
  • Item model number: TL-WN821N
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (139 customer reviews)
  • Amazon Best Sellers Rank:
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: June 13, 2009

Customer Questions & Answers

Customer Reviews

Thank you and i will be recommending this product to my friends and family.
Heather Horsley
To be frank, there are some linuxes that still don't work with it, but they are now the minority.
Christopher J. Davlin
The performance was consistently slow and unreliable, with many drops off the network.
Robert Kaulbach

Most Helpful Customer Reviews

29 of 29 people found the following review helpful By Christopher J. Davlin on October 4, 2010
Verified Purchase
As a linux user primarily, I had had limited luck with similar items from Medialink, D-link and Ralink. This one, which uses the Atheros guts, is the most linux friendly of the bunch, and also works great with Windows 7. At last I can use my desktop with wireless that just plain works, regardless of which version of linux I use. To be frank, there are some linuxes that still don't work with it, but they are now the minority. All the big name distributions work flawlessly with this, and with linux getting better and better on a daily basis, this will only improve. No drivers to install... (unlike windows) just plug it in and it sees your available connection(s). Now that's what "plug and play" should be... not plug, insert cd, wait a few minutes, reboot, THEN (maybe) play. Sheesh!
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8 of 8 people found the following review helpful By Yvan on February 12, 2014
Verified Purchase
i bought these adapters because they used to use the atheros chipset, which is basically plug and play in linux. the adapters amazon has in stock now at the v4 adapters, which use the realtek chipset. if you aren't familiar with linux, it's a real headache to get the drivers installed and working. if you're looking for a plug and play adapter in linux, look elsewhere
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10 of 11 people found the following review helpful By Andrew on August 16, 2009
Verified Purchase
This product works flawlessly straight out of the box. The installation was a snap. It works best with the small usb extension provided. I use it with an old Dell laptop to connect it to my new D-Link615 router. It connects my network between two buidings separated by a small area of tropical rain forest, a distance of more than three hundred feet,and through three concrete walls.I like the AES encryption for the enhanced security. This has got to be the best product for the price. I was really impressed with the performance..
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11 of 14 people found the following review helpful By Mark T. Brody on December 9, 2009
Verified Purchase
I've had a Wireless N Router for some time now, but I always had a Wireless G Network adapter built into my laptop. I figured I'd go for the upgrade, because I could use a better signal with the extended range. I did my homework. I read reviews on EVERY Wireless N Adapter on the web. I came across this TP Link one, and figured it was the best bang for my buck. Well, that couldn't be further from the truth.

Prior to using this network adapter, I had a 54.0 MBPS connection -- the standard for a Wireless G. After hookup, It went down to a variable rate of 14.0 MBPS to 27.0 MBPS. The speed was more than cut in half! I thought I did something wrong, so I went through the installation steps again, and even did research online as to what I may have done wrong. Turns out, nothing.

So the speed was cut in half, but what about the range? Didn't increase a lick. This was actually a DOWNGRADE from the built-in Wireless B/G router I had already installed on my computer for free!

I'm appalled at the misleading reviews on here, as they were most likely planted. Avoid this adapter at all costs!

Oh, by the way, none of the software passes Verified Windows tests either. Throughout the installation, you constantly get "Warning!" pop-ups.

**Updated, December 22, 2009**
I've been using the adapter now a few weeks, and I mistakingly blamed the TP-Link Adapter for the slow down in the connection. It actually had something to do with my router. I now get speeds of 108.0 MBPS, so my internet speed DOUBLED. I'm happy with my purchase now, and can recommend this adapter.
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5 of 6 people found the following review helpful By Tom Servo on July 11, 2013
Verified Purchase
The TL-WN821N is a great 300MBps WiFi USB adapter that works on many operating systems (including Linux/Raspberry Pi). The chipset is Realtek RTL8192CU
THE GOOD:
+ Adapter uses MIMO which means it can operate at up to 300Mbps and generally be faster and have better signal strength that a 150Mbps adapter that does not use MIMO.
+ Works fine on Windows, Linux, and even Raspberry Pi
+ Green activity LED shines through white plastic case without being overly bright or difficult to see.
+ Comes with short USB extension cable.
+ There is a WPS button on the side for easier setup via WPS (note I haven't tested this since I manually configure SSID etc)
THE BAD:
- This is a 2.4GHz adapter only - does not support 5GHz band.
- Cap might be lost easily since you cannot snap it on the opposite end of the adapter when using it.
- Longer than some "tiny" adapters but this is necessary since for 300Mbps/MIMO you need to have multiple antennas on the circuit board.
OVERALL it's a good network adapter and I recommend it.
I hope you find this helpful!
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5 of 6 people found the following review helpful By Miner on July 5, 2011
Verified Purchase
I bought this usb adapter after reading Christopher J. Davlin's review. I plugged in the usb adapter in my Linux PC, powered it on and it "saw" the wireless adapter. I configured the adapter to connect to my secure wireless LAN. It would connect via WPA security but only for seconds before disconnecting. I then used the wired eth0 adapter (to conect to the Internet) in order to run Update Manager. Once Update Mgr completed, I re-configured the wireless adapter, rebooted the PC and magic, it connected to my wireless router with WPA-personal security. It is a stable, secure connection. This adapter works well with Ubuntu 11.04. Thanks Christopher for taking the time to review this product!
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3 of 3 people found the following review helpful By Jeremy McNeal on August 13, 2013
Verified Purchase
I bought this for the linux compatibility; which it has; but I've also used it because my built-in wireless didn't have the range and this thing gave me a solid connection where the other one failed. Happy.
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TP-LINK TL-WN821N Wireless N300 USB Adapter, 300Mbps, w/WPS Button IEEE 802.1b/g/n, WEP, WPA/WPA2
This item: TP-LINK TL-WN821N Wireless N300 USB Adapter, 300Mbps, w/WPS Button IEEE 802.1b/g/n, WEP, WPA/WPA2
Price: $39.99 $17.17
Ships from and sold by Amazon.com