Werma signaltechnik led buzzer continuous tone werma signaltechnik 15010068 the werma signaltechnik 15010068 is an led permanent beacon with additional continuous tone for two stage signalling the 230v led buzzer has been designed for installation in controlswitchgear panels the maintenance free 80db led buzzer is easy to connect and has up to 50 000 hours life duration werma signaltechnik 15010068 led buzzer combination red 230vac