Bioteknix C3-400 is a powerful 4-door access controller designed for high-security environments. It supports up to 30,000 users and stores 100,000 event logs. The controller connects with up to 4 Wiegand or 8 RS-485 readers and communicates via TCP/IP and RS-485. It includes 12 inputs for door status, exit buttons, and fire alarms, along with 8 outputs for locks, alarms, or cameras. Features include Anti-Passback, interlocking, multi-card access, duress mode, and 256 time zones. It supports linkage with fire panels and real-time browser-based monitoring. Integrated with Bioteknix Access software, it provides detailed door-wise and user-wise reports. The C3-400 is ideal for offices, hospitals, campuses, factories, and government buildings needing secure and scalable access control. It comes in a durable, wall-mounted metal enclosure with stable operation in varied environments.