Werma signaltechnik continuous tone electronic buzzer 80db werma signaltechnik 10900068 the werma signaltechnik 10900068 is a continuous tone electronic buzzer with a plug in screwable connection it is ideal for 225mm diameter installation in controlswitchgear panels the 230v ac appliance is produced according to en 60947vde 0660 t100 werma signaltechnik 10900068 continuous tone electronic buzzer 230vac 80db