: At least 8GB (though older 4.x versions may run on as little as 2GB–4GB).
This version typically utilizes a local database (Microsoft Access or SQL Server Express). It is ideal for small to medium businesses (SMBs) with fewer than 500 employees. For larger enterprises requiring real-time synchronization across multiple branches, this legacy build may lack the necessary throughput and remote management capabilities. : At least 8GB (though older 4
: Connects to various ZKTeco biometric terminals via USB, RS485, or TCP/IP. : At least 8GB (though older 4