Blue ShillehTek 125kHz RFID key fob tag with metal key rings attached

125kHz RFID Tag with HT4168 Chip, EM4100 Compatible Access Control Token

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125kHz RFID tag with HT4168 chip, rugged ABS shell and keychain hole for everyday carry; ideal for apartment, gym, and office access control with EM4100-compatible readers.

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Overview

Product Overview

Compact and reliable, this 125kHz RFID tag uses the HT4168 chip for consistent signal transmission and is compatible with standard EM4100 proximity readers, making it a straightforward replacement for plastic badges. Coin-sized and housed in a rugged ABS shell, the token resists drops and moisture so it stands up to daily carry on a keyring or lanyard. The internal coil is engineered for instant proximity scanning, triggering authorization as it’s held near a sensor, which keeps entry smooth in high-traffic locations like apartment buildings, gyms, and offices. A reinforced steel ring hole simplifies attachment to keys or bags, offering a practical, low-maintenance access control option for everyday use.

Questions & answers

Frequently asked questions

This tag is compatible with standard 125kHz EM4100 proximity RFID readers. It is meant to replace compatible low-frequency access badges or tokens, not NFC or high-frequency RFID cards.
The tag is a passive access token, so there are no headers, wiring, or soldering involved. Enroll it in a compatible access control system, then hold it near the reader to trigger proximity scanning.
This token uses a 125kHz low-frequency RFID interface with an HT4168 chip and an internal coil. It is read wirelessly by a compatible proximity reader and does not connect through GPIO, I2C, SPI, or UART pins.
It is designed for everyday access control in places such as apartment buildings, gyms, and offices. The coin-sized ABS shell and steel ring hole make it practical for keyrings, bags, or lanyards.
No. This is a 125kHz EM4100-compatible proximity tag, while phones typically use NFC at 13.56MHz. If a system requires NFC, this tag will not be the correct replacement.

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What's included

Features & Specs

Operating Frequency 125kHz operation ensures compatibility with standard low-frequency proximity systems.

Chip Compatibility Equipped with HT4168 IC for stable signal transmission and EM4100 reader compatibility.

Rugged Housing Hard ABS shell resists water and impact for everyday keyring use.

Compact Form Factor Coin-sized design fits easily on keys, lanyards, or bag zippers.

Instant Read Range Internal coil triggers immediate proximity scans for fast contactless entry.

Keyring Ready Reinforced steel ring hole secures the token to keys or lanyards.

Ideal Use Cases Designed for apartment access, gym lockers, and office entry control systems.

Reference

Documents

Full Product Manual ShillehTek 125kHz RFID Tag HT4168 Chip EM4100 Compatible Access Control | ShillehTek Product Manual In-depth setup guide with wiring, code examples, and troubleshooting.

Datasheet

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