F21 is the first time attendance and access control terminal applying the most advanced SilkID technology. It not only possesses outstandingly high identification rate towards dry, wet and rough finger, but also provides the utmost security by its live finger detecting capability.as well as photo taking function which enables attendance photo and Photo ID(optional).

Product Image
Product image
Product image

Product Features

2.4-inch TFT color screen

SilkID fingerprint reader with living object detecting function

Multiple Verification Modes: Multi-verification methods (card is optional) providing user various choices

Full Access Control Features: Anti-passback, access control interface for 3rd party electric lock, door sensor, exit button, alarm and doorbell

Camera Function: record photo, photo ID (optional)

Built-in auxiliary input with enhanced flexibility to link with wired detector or emergency switch

Technical Specifications


2.4-inch TFT LCD Color Screen

Fingerprint Capacity


Card Capacity

5000(Optional) ID or IC Card

Transaction Capacity



SilkID Sensor

Algorithm Version

ZKFinger VX10.0


RS232/485, TCP/IP, USB-host

Access Control Interface

3rd Party Electric Lock, Door Sensor, Exit Button, Alarm, Doorbell

Wiegand Signal

Input, Output,SRB

Aux. Input

1ea for linkage function


DST,Automatic Status Switch, Anti-passback,Scheduled-Bell,Printer(Optional)

Power Supply

12V DC,3A

Operating Temperature

0 °C- 45 °C

Operating Humidity


SDK and software

Standalone SDK,ZKBioAccess