… (for example, bells, sirens, indicator panels, burglar or fire alarms), other than those of heading 85.12 or 85.30. …
Explanatory notes
… (for example, bells, sirens, indicator panels, burglar or fire alarms), other than those of heading 85.12 or 85.30. … (2) Number indicators . The signals appear as illuminated figures on the face of a small box; in some apparatus of … part of the floor, opening a door, breaking or touching fine wires, etc. (2) By capacitance effects . These are used …