USB RFID Card Reader 125KHz EM4100 TK4100 – Plug & Play
USB RFID Card Reader 125KHz EM4100 TK4100 – Plug & Play
Asia-Teco 125KHz USB RFID Card Reader – Plug & Play, No Drivers Needed
The Asia-Teco R20D/R20C USB RFID Card Reader is a compact, high-sensitivity contactless card reader operating at 125KHz. Compatible with EM4100 and TK4100 format cards, this device connects instantly via USB and is recognized by your computer as a standard keyboard input — no additional drivers or software installation required. Made in Mainland China.
Key Features
- True Plug & Play: Connects via USB and emulates keyboard input — card numbers appear directly at your cursor in any open application (Notepad, Excel, Word, etc.).
- 125KHz Frequency: Reads EM4100 and TK4100 contactless ID cards with a working distance of up to 8 cm.
- No External Power Required: Powered entirely through your computer's USB port — no adapter or batteries needed.
- LED & Buzzer Indication: Red indicator light at standby; flashes green with audible buzzer beep on successful card read for instant confirmation.
- Broad OS Compatibility: Works seamlessly with Windows and Linux operating systems.
- Wide Application Range: Ideal for access control systems, hotel door locks, attendance tracking, consumption management, and general RFID management applications.
- Durable Design: Operates across a wide temperature range of -30°C to +60°C and humidity levels of 5%–95% (non-condensing).
Specifications
| Brand | Asia-Teco |
| Model | R20D / R20C |
| Color | Black |
| Frequency | 125KHz |
| Supported Cards | EM4100, TK4100 |
| Interface | USB |
| Power Input | USB (from PC) |
| Working Distance | Up to 8 cm |
| USB Cable Length | Approx. 140 cm |
| Dimensions | 104 × 68 × 10 mm |
| Operating Temperature | -30°C to +60°C |
| Humidity | 5%–95% RH (non-condensing) |
| Audio/Visual Indication | LED + Buzzer |
| OS Support | Windows, Linux |
| Country of Origin | Made in Mainland China |
How to Use
- Plug the USB card reader into any available USB port on your computer.
- The reader performs a self-test (you'll hear a "beep") and the indicator light turns red — it is now ready to scan.
- Open any text input application (e.g., Notepad, Excel, Word).
- Place your RFID card within 8 cm of the reader.
- The light flashes green, the buzzer sounds, and the card's ID number is automatically entered at your cursor position.
Learn More About RFID Technology
For a deeper understanding of how RFID and contactless identification systems work, visit the NIST Guidelines on Securing RFID Systems.
Frequently Asked Questions
Q: Does the Asia-Teco 125KHz USB RFID Card Reader require any driver installation?
A: No. The reader is fully plug-and-play. Once connected to your computer via USB, it is automatically recognized as a standard keyboard input device. No drivers or additional software are needed on either Windows or Linux systems.
Q: Which RFID card formats are compatible with this reader?
A: This reader supports EM4100 and TK4100 format 125KHz contactless ID cards — among the most widely used card formats for access control, attendance, and asset management systems.
Q: How far away can I hold my card and still get a successful read?
A: The working distance is up to 8 cm (approximately 3 inches). For the most reliable read, hold the card within 2–5 cm of the reader's surface.
Q: Can I use this RFID reader with Mac OS?
A: The reader is officially tested and supported on Windows and Linux. While many users find it also works on macOS (since it emulates a USB keyboard), macOS compatibility is not officially guaranteed by the manufacturer.
Q: What applications can I use to capture card data with this reader?
A: Because the reader outputs card numbers as simulated keystrokes, you can capture data in virtually any text-input application — including Notepad, Microsoft Word, Excel, Google Sheets, web forms, or any custom database or access-control software.