The KADRIS 4 registration system hardware includes registration terminals and contactless identification media, such as cards, key tags and smartphones. The advantage of KADRIS 4 hardware lies in the in-house development and production of individual components in Slovenia, which enables a stable supply chain, high-quality servicing and regular upgrades. In-house development also ensures flexibility and consulting in system design, as well as smooth implementation of scale-ups and upgrades. A high level of reliability is ensured by a set of standard components with an above-average service life. All products are regularly tested at the Slovenian Institute of Quality and Metrology in Ljubljana and certified according to the highest security standards, further emphasizing their quality and security.