C3 Pro Series is a next-generation series of panels having advanced access control features including anti-passback, first-card opening, multi-card opening, duress password entry, embedded card verification which support real-time PUSH protocol communication.

Choice of Readers: 
Full range of Wiegand readers supported. Full range of readers including but not limited to ZKTeco prox, 
HID prox, HID iClass, HID Seos, Fingerprint, Face, Palm, Bluetooth and QR Code. 
Communication: 
C3 Pro panels support TCP/IP communication and install easily on your network.
Lowest Total Cost of Ownership: 
C3 Pro panel firmware can be upgraded in the field. New controller features can be loaded without any advanced tools, extending and expanding the value of your investment.
Capacity: 
30,000 users and 100,000 events. Panel can be backed up in real-time on to an optional SD card. All data is preserved on the panel if power is lost. Panel continues operating even when network connection is interrupted. 
Options: 
C3 Pro panels come in two configurations to suit project needs and reduce the cost of unused capacity. 2-door and 4-door models can be mixed and matched in an optimized system architecture.
Built-In Advanced Access Control: 
Anti-Pass-back, First-Card Opening, Multi Card Opening, Duress Password Entry, and Auxiliary Input/Output Linkages are built into the firmware.
For Software Developers: 
SDK is available for integrators and OEM’s to integrate the C3 Pro panels with their existing security or personnel management applications. Upon request, ZKTeco can also customize C3 Pro firmware to meet any custom requirements.