---
product_id: 98088484
title: "RFID Contactless Smart Card Reader R21D ID Card 125kHz Reader RS232 ID Card Reader TK4100/EM4100/EM4001Support Win XPWin CEWin 7Win 10LinuxVistaAndroid"
brand: "luxtech"
price: "28722 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/98088484-rfid-contactless-smart-card-reader-r21d-id-card-125khz-reader
store_origin: HU
region: Hungary
---

# RS232 Communication Multi-OS Support 125kHz Frequency RFID Contactless Smart Card Reader R21D ID Card 125kHz Reader RS232 ID Card Reader TK4100/EM4100/EM4001Support Win XPWin CEWin 7Win 10LinuxVistaAndroid

**Brand:** luxtech
**Price:** 28722 Ft
**Availability:** ✅ In Stock

## Summary

> 🔗 Unlock Efficiency with Every Scan!

## Quick Answers

- **What is this?** RFID Contactless Smart Card Reader R21D ID Card 125kHz Reader RS232 ID Card Reader TK4100/EM4100/EM4001Support Win XPWin CEWin 7Win 10LinuxVistaAndroid by luxtech
- **How much does it cost?** 28722 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/98088484-rfid-contactless-smart-card-reader-r21d-id-card-125khz-reader)

## Best For

- luxtech enthusiasts

## Why This Product

- Trusted luxtech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Data Capture:** Instantly reads UID numbers, streamlining your data entry process.
- • **Robust Performance:** Reliable operation across multiple platforms including Windows and Linux.
- • **Seamless Integration:** Easily connects via USB or serial port for hassle-free setup.
- • **User-Friendly Operation:** Designed for both tech-savvy and novice users with straightforward functionality.
- • **Versatile Compatibility:** Supports TK4100/EM4100/EM4001 cards for diverse applications.

## Overview

The R21D RFID Contactless Smart Card Reader is a versatile 125kHz ID card reader that supports various operating systems and card types. With its RS232 communication and multiple baud rate options, it ensures quick and reliable data capture for applications ranging from access control to information inquiry.

## Description

Important notice: If you are using reader for the first time, you will need the DEMO. Please contact us for the download link. The download link is valid for 7 days. You do not need to submit a return request for malfunction of the reader, the player works fine.

## Features

- R21D is a standard 125kHz frenquency RS232 communication ID card reader with optional baud rate of 9600, 19200, 115200, and so on. Support cards: TK4100/EM4100/EM4001, etc...
- The user connects the serial port and the USB interface of the data cable of the card reader to the interface of the computer mainframe one by one (open the serial debugging assistant test). When the RFID card is close to the card reader, the factory serial number (UID number) of the RFID card will be reflected in the window of the serial debugging assistant, which is equivalent to the automatic keyboard input number.
- Application: Data entry, information inquiry, Internet cafe registration, book lending, conference sign-in, access control and other fields.
- Common problems: (1) Operation without feedback: Please check whether the interface plugged in, whether the tag is a valid or whether another RF tag is within the reading range. (2) Data error: Please check whether the mouse is moved, whether the reader is in a critical state and whether the cable length is too long.
- Important notice: If you are using reader for the first time, you will need the DEMO. Please contact us for the download link. The download link is valid for 7 days. You do not need to submit a return request for malfunction of the reader, the player works fine.

## Product Details

- **Brand:** Luxtech
- **Connectivity technology:** USB
- **Colour:** Black
- **Compatible devices:** Personal Computer
- **Hardware interface:** USB

## Images

![RFID Contactless Smart Card Reader R21D ID Card 125kHz Reader RS232 ID Card Reader TK4100/EM4100/EM4001Support Win XPWin CEWin 7Win 10LinuxVistaAndroid - Image 1](https://m.media-amazon.com/images/I/61wmAp9fwRL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.hu/products/98088484-rfid-contactless-smart-card-reader-r21d-id-card-125khz-reader](https://www.desertcart.hu/products/98088484-rfid-contactless-smart-card-reader-r21d-id-card-125khz-reader)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-02*