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ACR122U-A9 Contactless IC Card Reader
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ACR122U-A9 Contactless IC Card Reader

- White

    COD This product supports COD on delivery. Suggestions: Do not place orders with non-COD products, otherwise you will not be able to choose COD payment method.
    Ship between: Oct 02 - Oct 04, Estimated Shipping Time: business days Order Processing Time may require a few days. Once dispatched from warehouse, Shipping (or Delivery) Time depends on the Shipping Method.
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Provide SDK development kit for secondary development, download URL:

The ACR122 is a USB full-speed device (12 Mbps) that reads NFC tags at speeds up to 424 bp, making the device faster and more readable and writable. In addition, the ACR122U is also compliant with the PC/SC standard for different applications and platforms. Its slim size and versatility make it extremely convenient for applications such as electronic payment, access control, attendance, and public transportation.
2.0. Product Features
· Comply with CCID standards
· Comply with PC/SC standards
· Read and write speeds up to 424 kbps
· With built-in antenna for access to contactless tags, the distance between the smart card can be read and written up to 50 mm (depending on the type of tag)
· Supports A 14 and B cards, Mifare cards and 4 NFC (ISO/IEC 18092) tags in accordance with ISO 14443
· Support 3 modes of NFC: reader, card emulation and peer-to-peer mode
· Built-in anti-collision function (at least one card can be detected when multiple cards are present)
· USB full speed (12 Mbps)
· User-controllable two-color LED indicator
· User-controlled buzzer
3.0. Typical application
· E-government
· E-banking and electronic payments
· Electronic medical
· Traffic
· cyber security
· Access control
· Points discount

4.0. Technical Specification Interface
Universal serial bus interface
Power supply: powered by USB
Speed: 12 Mbps (full speed)
Source current: 200 mA (maximum); 50 mA (standby), 100mA (conventional)
Contactless smart card interface
Standards: iSO/IEC 18092 NFC, ISO 14443 A and B, Mifare
Agreement: T=CL protocol
Operating frequency: 13.56 MHz
Smart card read/write speed. 106 kbps, 212 kbps, 424 kbps
Material: Poly carbonate (PC)
Antenna size: 0 mm x 40 mm
Operating distance: up to 50 mm (depending on the type of label)
peripheral equipment
Two-color LED: two-color LED: red and green
Buzzer: single tone
Working status
Temperature: 0 – 50°C
Humidity: 10% - 80%
Length: 1.0 M (USB)
Standard / certification
PC/SC, CCID, CE, FCC, VCCI, RoHS, USB full speed
Driver supported operating system
Windows 98, ME, 2000, Server 2003, XP, Vista, Server 2008, Server 2008 R2, 7
Windows CE 5.0
Linux, Mac


Dimensions and Weight

Product weight: 0.0700 kg
Package weight: 0.1000 kg
Product Size(L x W x H): 9.80 x 6.50 x 1.25 cm / 3.86 x 2.56 x 0.49 inches
Package Size(L x W x H): 10.00 x 7.00 x 1.50 cm / 3.94 x 2.76 x 0.59 inches

Package Contents

Package Contents: 1 x IC Card Reader, 1 x English Manual
ACR122U-A9 Contactless IC Card Reader- White

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FAQ for ACR122U-A9 Contactless IC Card Reader

  • The smart doorbell is offline

    ● Make sure your Wi-Fi network is working properly.

    ● Restart the camera.

    ● Restart the Wi-Fi router.

    ● Check if your network has enough bandwidth.

    ● Check if the Wi-Fi signal is disturbed.

    The detail you can read this post:

    Smart doorbell common issues and solution

  • Wi-Fi network is not displayed in the app during the installation.

    Your doorbell may be too far away from your Wi-Fi router, the wireless signal is disrupted or there are other problems with your Wi-Fi network.
  • The camera is offline and can't reconnect.

    You can follow the steps below to solve problems.

    ● Make sure that the camera is plugged in and receiving power.

    ● Check whether the camera is warm or cold to the touch

    ● Move the camera

    ● Restart the camera

    ● Restart the router

    ● Check the settings of your Wi-Fi network or router

    ● Make sure your router is on the list of incompatible devices

    ● Try turning off other wifi-connected devices

    ● Reset the camera

  • The video is blurry and spotty

    ● Remove the sticker on the lens.

    ● Remove dust or dirt from the lens with a soft, lint-free cloth.

  • The doorbell does not work or sounds weak

    ● Check the switch or the socket for.

    ● Check the voltage in the Nest app.

    ● Check the bell settings in the app.

    ● Check the bell wiring.

    ● Check the doorbell wiring.

    ● Check if the transformer of your doorbell is compatible.

    ● When it is very hot or cold outside.

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