Safety Unit to shut off laser projectors by using the interlock connection interface. Safety Unit can be connected to the RJ45/RS-232 interlock interface of a laser projector. Built-in key switch, without emission LED. Including 5 m interlock connection cable. All Safety Units have RJ45 to DB9/RS232 adapters included to suit our latest ranges of lasers with RJ45/etherCON interlocks as well as the traditional DB9/RS232 interlocks.