ZKTeco F21 Biometric Device

Product Description

The ZKTeco F21 is a fingerprint biometric access control and time attendance terminal that combines secure biometric verification with flexible access control features. It’s widely used in offices, factories, schools, hospitals, and other facilities to authenticate users and record attendance or control door access.

Key Features

Biometric Technology

• Advanced SilkID / Z-ID Sensor — provides high accuracy and excels at reading dry, wet, or rough fingers with live-finger detection to reduce spoofing.

• Live Finger Detection — enhances security by detecting real fingers versus fake molds.

Display & Interface

• 2.4-inch TFT LCD color screen with intuitive menus and prompts.

Capacity & Storage

• Fingerprint templates: Up to 3,000 users.

• Card capacity: Up to 5,000 (optional ID/MIFARE).

• Transaction logs: Up to 100,000 events.

Verification Modes

Supports multiple modes — fingerprint, card (optional), and combinations (e.g., fingerprint + PIN/card) depending on setup.

 Connectivity

• Communication: RS232/RS485, TCP/IP, USB-host for data transfer or management.

• Wiegand I/O: For integration with external controllers or electric locks.

 Access Control Interface

Interfaces with electric locks, door sensors, exit buttons, alarms, doorbells, and similar access devices.

 Optional Photo Capture

Some models can take photos for attendance records or Photo ID, adding an extra layer of verification.

 Security Features

• Anti-passback

• Automatic status switch

• Scheduled bells

• DST (Daylight Saving Time) support

 Software & SDK

Works with ZKBio CVAccess or ZKAccess3.5 software for centralized management, and an SDK is available for custom integrations.

 Power & Environment

• Power: 12 V DC, ~3 A.

• Operating temp: 0 °C - 45 °C; Humidity: 20 % - 80 %.

Common Uses

✅ Workplace time attendance tracking
✅ Door access control for secured areas
✅ Employee authorization & auditing
✅ Integration with HR/payroll systems (via software)