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Compact USB NFC RFID reader with five UID key fobs

YINGHUA

YINGHUA Chain Guard Door Lock Metal Entrance 122U 13.56MHz 424Kbps 50 UID Keys

SKU CH-49GF-94710

NFC RFID reader and writer with USB interface, 424 Kbps speed and 50 UID keys included

  • TypeChain Guard
  • MaterialMetal
  • FunctionEntrance
  • USB full-speed interface for fast PC connectivity
  • CCID-compliant reader works with standard smart-card software
  • Reads and writes NFC tags at up to 424 Kbps
  • Supports ISO 14443 and ISO 18092 contactless cards
  • Includes 50 writable UID keys for cloning and testing

NFC RFID Reader 13.56MHz

The ACR122U is a USB contactless smart card reader and writer for developers and integrators working with ISO 14443 and ISO 18092 tags. It supports MIFARE, FeliCa and NFC formats in access control, payment and attendance systems. The CCID-compliant interface allows direct use with PC/SC middleware across multiple platforms. Five writable UID keys are included for immediate testing.

USB full-speed power and silent operation

The device draws power from a standard USB full-speed port with no external supply required. An internal antenna handles communication up to 424 Kbps without moving parts, so the unit runs silently. Heat output is negligible during continuous read and write cycles. The compact metal housing stays cool to the touch in normal indoor use.

CCID-compliant USB interface

This single specification decides whether the reader fits your software stack; it must run on a host that supports the CCID device class over USB full speed. No proprietary driver is needed on modern operating systems. If your application expects a legacy serial or proprietary HID device, this unit will not enumerate correctly.

Highlights

  • USB full-speed interface for fast PC connectivity
  • CCID-compliant reader works with standard smart-card software
  • Reads and writes NFC tags at up to 424 Kbps
  • Supports ISO 14443 and ISO 18092 contactless cards
  • Includes 50 writable UID keys for cloning and testing

Specifications

TypeChain Guard
MaterialMetal
FunctionEntrance

Questions about this item

How do I install the ACR122U reader and which driver step is often missed?

Connect the reader via USB full-speed interface; the PC/SC driver must be installed after the CCID driver, otherwise the device will not appear in smart-card applications.

What maintenance or replacement will the included UID keys need over time?

The 50 UID keys are writable S50 cards; they can be re-encoded repeatedly, but the integrated antenna may wear if bent, so replace any key that no longer reads at 13.56 MHz.

What throughput limit appears first during continuous NFC tag operations?

The contactless link caps at 424 Kbps, so sustained read/write sessions hit that ceiling before the USB full-speed bus becomes a bottleneck.

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