TP-Link TL-WN821N 300M USB Wireless LAN Desktop PC wifi Receiver Transmitter

TP-Link TL-WN821N 300M USB Wireless LAN Desktop PC wifi Receiver Transmitter

Product description:

Product parameters:

  • Product Name: TP-LINK TL-WN821N
  • Brand: TP-Link / 普联 技术
  • Model: TL-WN821N
  • Model: TL-WN821N
  • Condition: New
  • Wireless: Wireless
  • NIC socket: USB
  • Transmission speed: 300Mbps
  • Applicable network type: Fast Ethernet
  • After-sales service: Genius

This card is a wireless USB card, not a 3G wireless network card, please pro to see clearly buy Oh! Is the desktop or wireless card damaged notebook computer to receive wifi wireless signal design, through the computer's USB interface to receive wireless network Need to have their own broadband, wireless router, and the location of the computer has its own wireless router, the stability of the available wireless signal Caixing Oh do not have rub network function.

Another function of this card is the analog AP, wifi transmitter or called 'wifi' in the absence of restrictions on network sharing, through a wired local connection to the Internet computer, install the client software, set the cable can be converted into wifi, this feature In addition, the campus network, unit network, Internet cafes and other special-purpose client, limit network sharing, limit the application of the computer installation of the wired network can not be shared, the network card can not be used to launch the wireless function.Non-use, not for the use of emergency, NIC quality problems, the network itself.

300M wireless USB card

300M wireless USB card

The video is 821 and 823 contrast, in addition to the size of the shape and chip difference, the other functions and performance is almost oh. This link is 821n baby.


11N wireless technology, 300Mbps wireless speed

    • TL-WN821N uses MIMO architecture and CCA idle channel detection technology can fully enhance the wireless performance, effectively solve the wall, distance and other wireless signal caused by blind spots, enhance wireless signal stability, provide better wireless performance and superior Connection stability.
  • QSS fast security settings, wireless network security, set up fast
  • Support analog AP (Soft AP) function, access to the Internet can be used as a wireless AP for mobile phones, Pad Internet
    • Operating system support

  • Windows XP / XP 64

    Windows 7 / Windows 7 64

    Windows 8 / Windows 8 64

    Windows 8.1 / Windows 8.1 64

    Windows 10 / Windows 10 64

Robust wireless performance
Compared with the traditional 54Mbps 11G products and 150M products, the TL-WN821N uses 11N wireless technology and wireless transmission rate of up to 300Mbps.With high wireless bandwidth, Online games, online on-demand smooth.
The TL-WN821N uses a 2 × 2 MIMO (Multiple Input Multiple Output) architecture with two Smart Antennas. The TL-WN821N enhances its wireless reception capability and enhances the stability of the wireless signal.
The TL-WN821N also uses the CCA (Clear Channel Assessment) channel detection technology to automatically adjust the bandwidth mode to avoid the interference of the channel and to stabilize the wireless signal when the surrounding wireless signal interference is detected.When the interference disappears, But also automatically bundled idle channel, take full advantage of channel bundling to enhance wireless performance.
All-round security
The TL-WN821N supports WPA-PSK / WPA2-PSK, WPA / WPA2 security, and WEP encryption to protect the wireless network from infringement and misappropriation.
The TL-WN821N is equipped with a QSS quick security setting for the QSS or WPS, and can be configured by pressing the QSS Fast Security button on the wireless router and the network card, or by entering the router's PIN code, you can complete than the traditional WEP encryption security WPA2 wireless security connection, do not need to remember the complex password.

Analog AP function, access via wired local connection Internet access and no restrictions on network sharing, no restrictions on application installed computer, you can use as a wireless AP, for mobile phones, Pad Internet

Plug the TL-WN821N into an Internet-enabled PC that is connected to the Internet through a wired local connection, and does not restrict network sharing. The Soft AP functions as a wireless AP, which can support other notebooks, mobile phones, and Pad. Wireless Internet access.

Hardware specifications


  • USB 2.0


  • Built-in two smart antennas


  • 69mm x 21mm x 10mm

Use of the environment

  • Operating temperature: 0 ℃ ~ 40 ℃
  • Storage temperature: -20 ℃ ~ 70 ℃
  • Humidity: 10% ~ 95% RH non-condensing

Package Contents

  • 300M wireless USB card TL-WN821N
  • Drive the disc
  • User Manual
  • Warranty Card
  • Description of toxic and hazardous substances

Wireless characteristics

Follow the standard

  • IEEE 802.11n; IEEE 802.11g; IEEE 802.11b

Transmission rate

  • 11b: 1/2 / 5.5 / 11 Mbps
  • 11g: 6/9/12/18/24/36/48 / 54Mbps
  • 11n: up to 300Mbps

Frequency Range

  • 2.4 to 2.4835 GHz

Working channel

  • 1 ~ 13

Transmission power

  • 20dBm (large value)

Software features

Security features

  • WPA / WPA2
  • 64/128-bit WEP encryption
  • QSS Quick Security Settings

Other functions

  • Analog AP function

Operating system support

  • Windows XP / XP64;
  • Windows 7 / Windows 7 x64 / win8 / win8.1 / win10

Note: In order to obtain better system compatibility, we recommend that you install a new system upgrade patch

Note: In order to obtain better system compatibility, we recommend that you install a new system upgrade patch

TP-Link TL-WN821N wireless network card (the following evaluation from Zhongguancun Online)

TP-Link TL-WN821N wireless card overview

TP-LINK's TL-WN821N wireless network card with a new design, which supports the IEEE 802.11n standard and USB interface, to meet the network video, voice and other high-bandwidth application requirements.Is the market in the high cost 11n wireless network card.

TP-LINK TL-WN821N wireless card

TL-WN821N uses a new black and white appearance, the front is white, the back of the black, the material is very particular about material selection, feel very smooth, the overall fine work, it looks very beautiful.

  • 69mm x 21mm x 10mm

The TL-WN821N is compliant with IEEE 802.11n, IEEE 802.11g and IEEE 802.11b standards, and has a wireless transmission rate of 300M. It is compatible with 11g and 11b devices and has passed the Centrino compatibility test , Suitable for use with desktops and notebooks.

Applicable Type
Notebook / Desktop
Network standards IEEE 802.11n, IEEE 802.11g, IEEE 802.11b
Network protocol CSMA / CA with ACK
Transmission rate 300Mbps
Spread Spectrum Technology Direct Sequence Spread Spectrum (DSSS)
Modulation OFDM, CCK, 16-QAM, 64-QAM
Transmission power 20dBm (large value)
Frequency Range 2.4-2.4835 GHz
Working channel 1-13
Bus interface USB
Antenna type Built-in smart antenna
Safety performance WPA-PSK / WPA2-PSK, WPA / WPA2, 64/128-bit WEP encryption, QSS fast security settings

TL-WN821N uses MIMO technology, built-in two smart antennas, providing good wireless transmission performance, stability and wide transmission range.It also uses CCA technology, can automatically avoid the channel interference and take full advantage of the channel bundling advantages.Security, The TL-WN821N supports 64/128/152-bit WEP encryption and advanced encryption and security mechanisms such as WPA / WPA2, WPA-PSK / WPA2-PSK, and QSS (Quick Secure Setup). Set up wireless security.

Test Comments:

TP-LINK TL-WN821N has a beautiful appearance and small figure, it is a good partner for notebook desktop.It's very good performance, features are also very rich, it is simple to use, with easy to use user management software, easy configuration Wireless client, is the comparison value in the market 11n wireless card.

Installation and Application of Wireless Network Card under Windows

Microsoft has released Windows 8Operating system System, the majority of our wireless card Under the system can be used normally Windows 8The use of the system can be divided into the following two situations:

one, The system can be directly identified and used (no need to install the driver)

due to Windows 8The system integrates a number of network card chip driver, so most of our wireless card can be directly in the Windows 8System, without having to manually install the driver. Specific use is as follows:

1.After inserting the wireless card into the computer, the system will find the hardware and install the driver automatically. After a while, right click "Computer" on the desktop and select "Manage".

2.Click on the device manager, you can see the card has been properly identified.

3.Left-click on the wireless network connection icon in the lower right corner of the desktop to open the wireless signal list. Select the wireless signal corresponding to your wireless router and click the Connect button.

4.Enter the wireless signal password and click Next, wait a moment after the wireless way through the Internet.

After testing, the following Division I card Windows 8 32Bit Enterprise Edition can be recognized by the system:

TL-WN721N 3.0

TL-WN723N 2.0

TL-WN725N 1.0

TL-WN727N 3.0


TL-WN821N 4.0

TL-WN823N 1.0

two, Need to manually install the driver to use

Some of the wireless card inserted in the computer, after waiting for some time may not be Windows 8System identification, as shown below:

At this point you can try to manually install the card corresponding Windows 7The system driver to see if it can be used normally. Specific methods are as follows:

1.In the Division I download the corresponding web site Windows 7System driver.

Download Links: For more information, please contact customer service (in this page, enter the product model to search)

2.Right-click on the yellow-marked device in the Device Manager and select 'Update Driver Software'.

3.Select 'Browse computers to find driver software'.

4.Click 'Browse', find the folder where the driver is located, and click 'OK'.

5.Click 'Next'.

6.If you have the following prompt, select 'Always install this driver software'.

7.Successfully installed driver.

8.After successful installation of the driver, the device manager's network adapter will normally display the wireless network card device, and then you can search for wireless signals and connections to achieve wireless Internet access.

I am the Secretary for the following wireless card Windows 8 32Bit Enterprise Edition can be used in accordance with this method to install the driver:

TL-WN722N 1.0

TL-WN721N 1.0

TL-WN322G + 2.0

Description: a small part of the wireless card such as TL-WN821N 1.0 / 2.0, TL-WN822N 1.0And so has not yet Windows 8The system driver can not be implemented in Windows 8System under the use of.

The following describes the analog ap settings, if used to receive the wireless router wireless signal is very simple, the first corresponding to the system to install the drive, and after the same as the use of a notebook.While receiving wireless and wired to wireless different at the same time, this paragraph Baby support analog ap function.

Wireless LAN Analog AP Function Setup Guide

Article Index:

1. Configure the analog AP

Step 1 Install the wireless network card driver and client software.

Step 2 Enable the analog AP function.

Step 3 Connect wirelessly to the analog AP.

Special cases: Analog APs share a broadband / 3G connection


1.Windows XP system simulation AP configuration

Wireless AP can provide wireless extended access to traditional wired LAN, and the general wireless card can only be used as a client to connect to the wireless AP.We have some analog wireless AP function, not only can be used as a wireless client to connect to the wireless network, Can also be switched to analog AP, for other wireless client connection.The typical application scenario is as follows:

In the absence of a wireless router, the computer is connected to the broadband line is already available on the Internet.Computer installed with analog AP function of the wireless network card, and set up to share Internet access to the Internet, analog AP and Internet access to the Internet connection Virtual out of a 'wireless router' other wireless devices such as laptops, mobile phones, PAD, etc. can be wirelessly connected to the analog AP to share the Internet.

The following describes TL-WDN3321 as an example of analog AP functions and virtual wireless router settings, as shown below.

Step 1 Install the wireless network card driver and client software, after installation is complete, as shown below.

Step 2 Enable the analog AP function.

1. Select the 'Advanced' option in the client software.

2. In the SoftAP mode, select 'On', and then click 'OK' to confirm that SoftAP mode is set up. Click 'OK' to display the 'Setting SoftAP mode, please wait for a moment.'

3. Configure the parameters of the simulated AP, as shown in the following figure. Click Apply after the configuration is complete.

Internet connection sharing: When there are multiple network connections on the computer, choose to connect to the Internet network connection, in this case to 'local connection', for example, select the local network card as the corresponding 'virtual wireless router' WAN interface .

Network Name: The wireless network name (SSID) that the network card works in SoftAP mode, that is, the wireless network name that the wireless device searches for the analog AP.

Band: SoftAP work of the wireless band, dual-band wireless card supports both 2.4GHz, but also supports 5GHz, so the analog AP set to work when you need to select the frequency band in the Windows XP system can choose 2.4Ghz or 5Ghz. Support band selection, the default work in the 2.4GHz band.

Security mode: Analog wireless encryption type AP, WPA2-PSK is recommended.

Password Type: Wireless network encryption algorithm, the recommended choice of AES.

Security Key: The wireless network password you need to enter when connecting to an analog AP.

IP Address: The IP address of the wireless network card. When the SoftAP mode is enabled, it is automatically generated and kept in the default mode.

After setting the above parameters, click 'Apply', then right-click on the desktop 'My Network Places' select 'Properties', open the 'network connection', you can see 'local connection' has been shared.

Step 3 Connect to the SoftAP computer wirelessly. Select "SoftAP" and enter the "Security Key".

After the wireless connection will automatically obtain IP address and other network parameters, this time through the SoftAP to surf the Internet.

Special case: computer via broadband connection or 3GConnect to the Internet, and openSoftAP Mode 'Internet Shared connection ' Option does not 'Broadband connection ' and '3GInternet access ' This option, how to do? The following describes the simulation AP Shared broadband connections and 3GInternet connection settings, the steps are as follows.

1.# Enable SoftAP , Settings 'Internet Connection Sharing ' Other parameters, click 'application' .

2.To unshare a local connection, right-click 'local connection ' , Select 'Properties' - 'Advanced' ' , In 'advanced ' Option 'Internet Connection Sharing ' —— 'Allow other network users to pass this computer Internet Connect to connect ' Remove the checkmark and click 'determine' .

3.Set up a shared broadband connection and 3GInternet connection

(1) Share Broadband connection ' Right click Broadband connection ' select 'Properties' - 'Advanced' ' , In 'advanced ' Option 'Internet Connection Sharing ' in 'Allow other network users to pass this computer Internet Connect to connect ' Check in, in 'Home network connection ' Select SoftAP Corresponding to the wireless network connection, in this case 'Wireless connection 2' , Select it and click 'determine' .

(2) Share 'CMCC' 3G Internet connection 'CMCC' select 'Properties' - 'Advanced' ' , In 'advanced ' Option 'Internet Connection Sharing ' in 'Allow other network users to pass this computer Internet Connect to connect ' Check in, in 'Home network connection ' Select SoftAP Corresponding to the wireless network connection, in this case 'Wireless network connection 30' , Select it and click 'determine' .

4.Wireless connection SoftAP , The computer's wireless connection to search for wireless networks, selected 'SoftAP' , And enter the wireless security key.

Computers, mobile phones, PAD And other devices on the wireless connection SoftAP After this can be passed 'Virtual wireless router ' To swim Internet .


Configure the simulation AP When prompted 'configuration ICS Failed 'solution

TL-WN721N 3.0, TL-WN725N 1.0, TL-WN727N 3.0as well as TL-WDN3321 1.0And other wireless network card support SoftAP FunctionSoftAP Function, you may get an error message 'Configuration ICS Failed, you can connect to SoftAP , But may not be able to use Internet services ' Screenshots are as follows:


1.On your computer 'Services and applications ' --- 'service ' , turn up 'Windows Firewall / Internet Connection Sharing (ICS)' Service, to ensure that this service has been opened, if not open, this service will be manually open and the startup type is set to automatic.

2.If the network connection on the computer is onSoftAP Has been manually shared before, and this shared cancellation.

3.If the network connection on the computer is onSoftAP And did not manually share before, but still suggest mistakes, it is likely that the computer system in the openSoftAP Function has been used before the network connection sharing application, its status has not yet returned to its initial state. SoftAP Function and then open the computer network connection page, find the local connection, check the local connection status has been shared.

(1If you have already shared, right-click 'local connection ' select 'Attributes ' --- 'advanced ' Tab, and then click OK 'Internet Connection Sharing ' Close, click 'determine ' Then turn the sharing on another network connection on and then on againSoftAP Features.

(2) If not shared, casually find a network connection, the sharing will be opened after the closure, and then try to re-openSoftAP Features.