This access control unit manages entry for up to 2000 users and offers flexible, secure ways to open doors. It supports three door opening methods: card, password, and card plus password. The unit also includes a doorbell interface and can connect directly to a wired doorbell for visitor notification. Key benefits Scales to large user bases: supports up to 2000 users, making it suitable for busy residential buildings, offices, and shared facilities. Flexible access methods: choose singlefactor entry with card or password, or require twofactor entry using card plus password for increased security where needed. Simplified visitor handling: builtin doorbell interface connects to a wired doorbell so visitors can signal occupants without additional wiring changes. Practical integration: designed to fit into environments that already use wired doorbell systems, reducing installation complexity. Core functions and attributes User capacity: supports up to 2000 individual user records for card and password credentials. Access modes: three selectable door opening methods — card, password, and card plus password. Doorbell interface: wired doorbell connection for visitor alerts. Intended use: central access control for controlledentry doors where multiple users require reliable access management. Performance and compatibility notes Handles a large number of users without changing entry method options. Works with standard wired doorbell setups for visitor notification. Designed for straightforward deployment in multiuser access environments. Typical applications Residential apartment buildings: manage access for residents, contractors, and service personnel while allowing visitors to ring the connected wired doorbell for entry requests. Small to medium offices: maintain controlled access for employees using cards or passwords and enforce twofactor entry for sensitive areas. Shared facilities and community spaces: support a large membership list and provide simple visitor communication through the wired doorbell interface. What this product solves Eliminates key management and makes user changes simple for up to 2000 people. Offers adaptable security levels by selecting singlefactor or twofactor access. Integrates visitor notification without adding separate doorbell hardware. This unit is a practical solution for sites that need scalable user management, flexible opening methods, and an integrated wired doorbell connection.