Werma signaltechnik continuous tone electronic buzzer 80db werma signaltechnik 10900075 the werma signaltechnik 10900075 is a continuous tone electronic buzzer with a plug in screwable connection it is ideal for 225mm diameter installation in controlswitchgear panels the 24v acdcappliance is produced according to en 60947vde 0660 t100 werma signaltechnik 10900075 continuous tone electronic buzzer 24vdc 80db