Mini USB RFID 125KHz ID Card Reader – Android & Windows OTG
Mini USB RFID 125KHz ID Card Reader – Android & Windows OTG
Mini Portable USB RFID 125KHz ID Card Reader
Meet the Asia-Teco LK003 Mini USB RFID Card Reader — a compact, plug-and-play 125KHz smart card reader designed for effortless compatibility with Android smartphones (via Micro USB OTG) and Windows PCs. Whether you're managing access control, attendance tracking, or asset identification, this tiny reader delivers fast, reliable card reading in a pocket-sized form factor.
Key Features
- Universal Compatibility: Works with Android devices (Samsung, Sony, VIVO, Xiaomi, and more via OTG) and Windows 8 / 7 / XP / 98 / 2000 / CE / ME / NT / Vista / Linux
- Fast Read Speed: Card reading in under 0.5 seconds for a smooth, efficient workflow
- Supported Card Types: TK4100, EM4100, EM4001 — the most widely used 125KHz proximity card standards
- Compact Design: Measures just 35mm × 35mm × 7mm — fits easily in a pocket or attaches to a keyring setup
- No Drivers Needed: Plug in via USB or Micro USB OTG and start reading immediately — no additional software installation required
- 10-Digit Decimal Output: Outputs card data in standard 10-digit decimal format, compatible with most access control and attendance software
- Low Power Consumption: Powered by +5V DC (USB), draws only 100mA — safe for all USB ports and phone OTG connections
- Read-Only Mode: Secure read-only operation ensures card data cannot be inadvertently altered
Technical Specifications
| Brand | Asia-Teco |
| Model | LK003 |
| Frequency | 125 KHz |
| Supported Cards | TK4100 / EM4100 / EM4001 |
| Output Format | 10-Digit Decimal |
| Read Mode | Read Only |
| Read Time | < 0.5 seconds |
| Power Supply | +5V DC (USB) |
| Current Consumption | 100mA |
| Dimensions | 35mm × 35mm × 7mm |
| Compatible Systems | Android, Windows 8/7/XP/98/2000/CE/ME/NT/Vista/Linux |
| Country of Origin | Made in Mainland China |
Who Is This For?
This RFID reader is ideal for IT professionals, system integrators, small business owners, and hobbyists who need a reliable, no-fuss card reader for access control systems, employee attendance, inventory management, or development and testing of RFID-based projects. Its OTG support makes it uniquely versatile for on-the-go Android users who need card reading away from a desktop.
Learn More About RFID Technology
For information on RFID standards and security best practices in access control systems, visit the NIST Guidelines for Securing RFID Systems.
Frequently Asked Questions
Q: Does this RFID card reader work with all Android phones?
A: The Asia-Teco LK003 works with Android smartphones that support Micro USB OTG (On-The-Go) functionality. This includes popular brands such as Samsung, Sony, VIVO, Xiaomi, and many others. Please verify that your Android device supports OTG before purchasing.
Q: What types of RFID cards are compatible with this 125KHz reader?
A: This reader supports TK4100, EM4100, and EM4001 card formats — the most common 125KHz proximity card standards used in access control, attendance systems, and identification applications. It does not support 13.56MHz cards (such as MIFARE or NFC).
Q: Do I need to install any drivers or software to use this card reader?
A: No driver installation is required for most systems. Simply plug it into a USB port on your Windows PC or use a Micro USB OTG cable/adapter with your Android device, and it will be recognized automatically as a standard HID (Human Interface Device).
Q: What is the output format of the card data?
A: The reader outputs card data in 10-digit decimal format, which is compatible with the vast majority of access control software, attendance management systems, and custom RFID applications.