The iButton (1-Wire) key is a small stainless steel "button" with a unique factory ID . Battery-free and with no moving parts, simply bring it close to the reader to validate access. It is highly reliable : robust against drops, dust and water, it withstands heavy use and maintains stable identification for years. Ideal for controlling doors/gates with simple permission management.
 Available as a keychain in red, green, yellow, blue, and black , making it easy to organize by profile or area.