: Compatible ZKTeco USB sensors (ZK4500, ZK9500, SLK20R).
When you download the package, you aren't just getting one file. The SDK typically includes:
: The primary source for all ZKTeco drivers and SDKs is the official ZKTeco website. Navigate to the "Download" or "Service" section.
: Some versions require you to run a register.bat file as an Administrator to register the OCX or DLL files with your system registry.