Using the Timeclock/Kronos™ integration tool, VSys One can accept clock records from your timekeeping system. This lets your volunteers clock in and out using the same badges and timeclocks that your employees use: much more convenient, and lower hardware costs.
(Our Timeclock Integration Tool used to be called just the "Kronos™ Integration Tool". Why the name change? The tool was never Kronos™-specific, but instead accepts feeds from any compatible timekeeping system.)