Sentry is a small light cue that connects to PerfectCue or PerfectCue Mini. It can be easily affixed to a speaker’s lectern, computer station, or downstage speaker, and lights up Green-Red-Yellow respectively with the Forward-Back-Blank commands from the presenter’s wireless remote controller.  Sentry can be connected to a cue light via Cat 5 cable. Dual RJ45 jacks allow multiple Sentrys to be interconnected along a single cable “run.”  Green, Yellow, Red lights correspond to PerfectCue’s USB commands Forward Arrow, Back Arrow and “B”.  (Note:   When connecting Sentry to a cue light, the cue light must be powered with its external 12 V mains supply.)