What microchips does OnlyCat support?

OnlyCat currently supports:

• FDX-B microchips - the industry standard used widely around the world.
• ER4100 collar tags (- such as these).

Coming soon:

We will soon release a firmware update (within days) to add compatibility with FDX-A microchips. These are an older standard used only in the USA and are very rare.

Updated on: 26/08/2025