The programmable RW1990 TM iButton is a high-performance contact smart card. Its shell is mainly made of high-quality stainless steel, making it durable and highly corrosion-resistant, capable of easily handling complex outdoor environments.

The core advantage of this Liteway iButton is its “rewritable code” feature. Using a dedicated reader/writer, the internal chip’s serial number can be repeatedly rewritten up to 100,000 times. After rewriting, the original identity information will be completely overwritten to generate a brand-new, unique ID code. This allows the device to be recognized as a “new card” by the system without any change in appearance.