Click on the "Device" or "Communication" tab.
However, to provide a useful answer, I need a bit more clarification — as "ZKTime50" isn't a standard public model name from ZKTeco (the main biometrics/attendance vendor). It's possible you mean: zktime50 attendance management systemver 487
This is an older version of the software. While stable for many older hardware models, it may lack the web-based features and mobile integration found in newer versions like ZKTime.Net or BioTime. Click on the "Device" or "Communication" tab
Microsoft Access databases become unstable after 500,000 rows. Migrate to SQL Server Express (free) for: to provide a useful answer
If the software says "Device Not Found":