Product Description
The ACM 125KHz RFID Key Fob is a proximity tag for door entry systems that read EM4100/EM4102 credentials. Present it to a compatible reader and the access controller checks its factory-programmed ID before releasing the door.
Where it fits on a job
- Office and residential blocks — issuing fobs per tenant or employee alongside a standalone reader or keypad controller.
- Parking access and security doors — one fob per vehicle or staff badge, no batteries or programming visit needed since each ID is unique and pre-set from the factory.
- Employee ID systems — carried on a keychain, lanyard or ID holder for daily clock-in/entry use.
Key specs
- Operating frequency: 125 kHz
- Compatibility: EM4100 / EM4102 proximity readers
- Read range: typically 2–10 cm, depending on the reader used
- Housing: waterproof ABS plastic, keychain format
- Credential: unique, pre-programmed ID — no on-site coding required
Specifying for a project
Check the reader spec on the job first — this fob only works with 125 kHz EM4100/EM4102-type readers, not higher-frequency (13.56 MHz) systems. For multi-door sites, order enough fobs to match the user count plus a small spare allowance, since each ID is fixed at manufacture and cannot be re-cloned to a spare.
Its waterproof ABS body suits fobs carried outdoors or left on exposed keyrings, though the reader itself should still be rated for its mounting location.
Specifications
- Brand
- ACM
Technical Specifications
Frequently Asked Questions
Which readers is this fob compatible with?
It works with 125 kHz EM4100 / EM4102 proximity readers, the standard used across many door entry and access control systems.
Does the fob have to be programmed before it's used?
No — each fob carries a unique, factory pre-programmed ID number that the reader and controller recognise straight away.
What's the typical read range?
Typically 2–10 cm, depending on the specific reader it's paired with.
Is the fob suitable for outdoor keyrings?
Yes, it has a waterproof ABS housing, though the reader itself should be rated for its own mounting location.
