Werma signaltechnik led double flash beacon yellow werma signaltechnik 85331054 the werma signaltechnik 85331054 is an led double flash beacon that gives an intensive double flash with low current consumption the yellow beacon is supplied with a 12v dc input voltage and can be wall base or ceiling mountedthe beacon is easy to install thanks to a snap on fixing bracket simply drill two holes attach the fixing bracket to the wall and snap on the beacon the cable can be fed through o