from the Lathem website...

This package of 5 key fob badges is a perfect addition to any PC50 system.  These badge replacements allow employees to attach a small device to their keys which reduces the chances that they are lost or forgotten at home.  If they drive, the employee can't come to work without their badge.  These key fobs work exactly like the badges and have the badge number printed on them for easy entry into the software.

(Key not included)