RFID Reader 125KHz - Reads Proximity & EM4100 Cards reliably

Our review of this 125KHz RFID reader finds it best for installers and hobbyists who need a simple, driver-free USB solution to read common proximity and EM ID cards. The reader's single biggest strength is versatility: it decodes both the 1326 family ISO Prox cards and EM4100 cards, then outputs the card UID as a keyboard-emulated HID device so it works immediately with Windows, Linux, iOS and Android (OTG). For anyone who needs a plug-and-play card scanner that can be configured to match different system formats, this reader delivers straightforward utility.

Key Features

• Dual card support: Reads both 125KHz 1326 family proximity cards and EM4100 ID cards so a mix of site credentials can be handled by one reader.
• HID USB plug-and-play: Acts as a keyboard device with no driver required, making it compatible with Win, Linux, iOS and Android (OTG) right away.
• Configurable output formats: Offers up to 40 output formats for EM4100 UID presentation, letting installers match the target system without extra software.
• Raw Wiegand option: Can send raw Wiegand bit data from 24 to 80 bits to help diagnose or integrate 1326 family cards with legacy systems.
• Keyboard layout support: Supports common layouts such as QWERTY and AZERTY so numeric output maps correctly across platforms.

Who It's For

This reader is ideal for system integrators, small business owners, and technicians who need a compact, driver-free 125KHz reader that covers both ISO Prox 1326 family cards and EM4100 formats. The configurable formats make it especially useful when you must adapt UID output to specific software, access control panels, or databases.

It is less suitable for teams who need writable card functionality or a long-term managed provisioning solution; this unit is read-only and meant for decoding and presenting existing card UIDs rather than issuing or encoding credentials.

Pros & Cons

Pros

• Wide card compatibility covers both EM4100 and 1326 family proximity cards, reducing the need for multiple readers.
• Driver-free HID USB operation provides immediate compatibility with major OS platforms and Android OTG hosts.
• Extensive format options and raw Wiegand output make it flexible for integration and troubleshooting.

Cons

• Configuration is done with a config card and some users report the instruction material can be confusing, which may require trial and error.
• Settings may sometimes need reapplying after power cycles according to some user reports, so it may not be ideal where fully persistent config is critical.

Specifications

Frequency	125KHz
Card support	1326 family ISO Prox and EM4100 ID cards
Output modes	Up to 40 UID formats or raw Wiegand (24 to 80 bits)
Interface	HID USB keyboard emulation (driver free)
OS compatibility	Windows, Linux, iOS, Android (OTG)
Keyboard layouts	QWERTY and AZERTY supported

Our Verdict

The reader is a practical, cost-effective choice for anyone who needs a versatile, driver-free 125KHz scanner that handles both proximity and EM ID cards. It is especially good value for installers and small sites that require configurable UID output or raw Wiegand for integration; however, those needing writable cards or foolproof configuration persistence should consider specialised encoders instead.

Frequently Asked Questions

Will this work with Android phones?
Yes, it works with Android devices that support OTG and a suitable OTG adapter; the device appears as a keyboard.

Can it write or program cards?
No, this unit is read-only and decodes existing card UIDs; it cannot write or encode card data.

How are formats changed?
Output formats are set using a configuration card provided with the reader so you can select one of the 40 UID formats or raw Wiegand output.