The GT-400 uses a hand geometry reader in the same manner as our fingerprint clocks. The main benefit of hand biometrics vs. fingerprint biometrics is that hand biometrics work more consistently in industries where fingerprints may be dirty or worn. It also guides the employee when positioning the hand on the reader.

Unlike fingerprint clocks, the GT-400 requires a PIN to punch in/out.

Here's a video showing how the hand punch works:

Hand templates only need to be enrolled once and are synchronized with the other clocks.

Can Employees Clock In/Out Without a PIN?

No, the GT-400 does not have an Identify mode necessary for recognizing employees without a PIN. Instead, the clock uses a Verify mode, which ultimately leads to more reliable and consistent results when reading the employees hand.

Verify mode allows the system to quickly identify the employee and then validates their hand measurements based on what was enrolled with that specific PIN. If the PIN was not required, the system would need to review every hand measurement on file to validate the punch. This would be very time-consuming. It currently takes 6 seconds (or less) to punch in/out using a PIN and hand validation.

Can Employees Clock In/Out Without a Handprint?

Yes, but this is not recommended since that eliminates the sole purpose of using a biometric clock, which is to prohibit buddy punching.

However, if for any reason the employee is unable to use their hand to punch in/out, the employer may choose to set the employee up with a Trusted PIN, which will allow them to bypass the hand validation process.