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Black rectangular RFID reader with USB cable, compact plastic body

YINGHUA

YINGHUA 125Khz RFID Reader EM4100 USB Proximity Sensor Smart Card Reader IDReader02

SKU CH-R7EH-02V7B

A 125 kHz USB RFID reader for EM4100 cards, plug-and-play with Windows 2000 through Windows 7, reading at 5–8 cm without external power

  • Main functionEntrance
  • Product typeChain Guard
  • Main materialMetal
  • Driver-free USB on Windows 2000, 2003, XP and 7
  • Reads EM4100 tags at 125 kHz from 5 to 8 cm
  • Built-in buzzer gives audible feedback on every scan
  • Powered directly from USB with no external supply needed
  • Compact 9.8 x 6.3 x 1 cm housing weighs 70 g

Product Identity

The YINGHUA IDReader02 is a USB proximity sensor that reads 125Khz EM4100 RFID cards and tags. It connects directly to a PC without an external power supply and outputs the first ten decimal digits of each card by default.

Accessories And Software Impact

The device is driverless for Windows 2000, 2003, XP and Windows 7, so it works immediately after plugging in. A built‑in buzzer and a diagnostic power LED give instant audible and visual feedback during operation. The 90 g unit includes a USB cable and has a waterproof hard‑plastic housing rated for -10 °C to 70 °C.

Who This Suits And Who Should Look Elsewhere

This reader suits integrators building access‑control, hotel‑lock or utility‑meter systems that use 125 Khz EM4100 credentials and need a compact USB interface. It does not suit buyers who need to read other frequencies or card formats, who require a longer read range than 5‑8 cm, or who need the last eight decimal digits without a custom firmware request.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $131.99
Pricier than about 73% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeChain Guard
Size & build
Main materialMetal
More details
Main functionEntrance

Questions about this item

Will the USB cable need replacement if it frays from daily access-control use?

The reader draws DC 5 V (+/-5 %) directly from the USB port, so a damaged cable can be swapped for any standard USB lead without an external power supply.

What limits continuous scanning at the 106 Kbit/s communication speed?

The EM4100 cards must stay within the 5–8 cm read zone; beyond that distance the reader cannot power the tag and throughput drops to zero.

Does the built-in buzzer or LED add noticeable heat or noise during all-day operation?

Operating temperature is rated -10 °C to 70 °C with only a diagnostic LED and buzzer, so heat and audible output remain minimal in typical indoor use.

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