How the compatible Miwa LA / ALV2 (Mifare 4K) works
The Miwa LA / ALV2 (Mifare 4K) is a 13.56 MHz high-frequency contactless credential read over the ISO/IEC 14443 air interface. Its data structure is MIWA Japanese hotel-lock encoding on Mifare 4K (LA/ALV2 HF series). When you present a credential, the reader decodes that exact structure and passes it to your access-control panel as a card number it recognises.
We build the compatible Miwa LA / ALV2 (Mifare 4K) by encoding the identical data structure onto a programmable Genuine NXP MIFARE Classic 4K chip. Once written, the reader cannot tell the difference between our credential and the original — it presents the same bits, the same facility code, and the same card number. That is what "compatible by specification" means: not a generic look-alike, but a credential engineered to read exactly as the original does.
The MIWA Lock Co. format sits among the specialist proximity credentials most card vendors never tooled up to produce — which is why the only other source is usually the original manufacturer, at a steep premium. Supporting these hard-to-find formats is exactly what Security ID Systems specialises in. Tell us the format printed on your card, or send a sample for us to read, and we confirm compatibility before you order.
Also known as
Miwa · MIWA · MIWA LA · MIWA ALV2
MIWA Lock Co. and all other brand and product names are trademarks of their respective owners. Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, sponsored by, or endorsed by these companies. Brand and format names are used only to identify the systems our products are compatible with. MIFARE and DESFire are registered trademarks of NXP B.V.