3 Color LED alarm beacon for CTM 360A label applicators and 3600 print & apply label applicators.  The light are for the following conditions

GREEN = Ready, applicator online and ready for labeling

YELLOW = Warning, goes off for low label alarm

RED = Critical fault - broken web, machine will not label in this condition

All CTM applicators are prewired for this option, so all you need to do is plug it in.  Great visual for opertors so they are aware of machine conditions.  This mounts right on the CTM upright.  these units sell for over $420.