The perimeter of the ROCK contains a ring of LEDs. The Rock illuminates colors based on ACS configurations. By default, the ACS controls the LED colors. Please check your ACS configurations to correlate what is seen with the Rock's LED ring. In this setting, the badge reader will flash the same color as the Rock.
Most customers will see the following
WHITE = idle / standby
GREEN = illuminates to indicate access granted
RED = access denied by ACS