The Combined Nomenclature (CN), v1:2019
8531 80 70: Electric sound or visual signalling apparatus (excl. indicator panels with LCDs or LEDs, burglar or fire alarms and similar apparatus, apparatus
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=ec3af576-673e-42d6-892f-12eb18291831