ZKteco F21 RFID Fingerprint time attendance and access control terminal


• 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

• Wireless door bell (Optional)

  • Description

Product Description

Technical Specifications

Display 2.4-inch TFT LCD Color Screen
Fingerprint Capacity 3000
Card Capacity 5000(Optional) ID or mifare card
Transaction Capacity 100,000
Sensor SilkID Sensor
Algorithm Version ZKFinger VX10.0
Communication 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
Functions DST,Automatic Status Switch, Anti-passback,Scheduled-Bell,Printer & Wireless door bell (Optional)
Power Supply 12V DC,3A
Operating Temperature 0 °C- 45 °C
Operating Humidity 20%-80%
SDK and software Standalone SDK,ZKAccess3.5 software


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).

In addition, with the brand new ZMM220 hardware platform, its clock rate can attain 1.2GHZ. Such speedy hardware platform and fingerprint algorithm greatly enhance the speed of fingerprint verification.

Installation Guide


RJ45 Connector

Screws and Holders

Screw Driver

0.42MBData Sheet2016-03-25

WDB02-R Wireless Doorbell User ManualV1.0_20160314
0.36MBUser Manual2016-03-25

F21 Time Attendance & Access Control User Manual V1.0_20150804
7.81MBUser Manual2016-04-29

2.4 Inch TFT Terminal Quick Start Guide V1.0-20150804
1.64MBQuick Guide2015-09-29

2.4 Inch TFT Terminal Installation Guide V1.0-20150804
2.84MBInstallation Guide2015-10-20