Werma signaltechnik led signal tower with buzzer variosign 24vdc werma signaltechnik 690 010 55 p the werma signaltechnik 690 010 55 is a variosign led 1 sided signal tower offering maximum functionality and cost effectiveness one of the main features of the new variosign is the electronic modern innovative design the variosign can be used in applications where the design and appearance are important p p if no signal is active the led tower blends into the background with its colour