Answer:
The Honeywell Morley-IAS MI-WSS-PR-N strobe sounder is billed under HSN code 85311020 for B2B procurement and tax compliance in India.
For institutional procurement, commercial documentation, and GST billing within India, the Honeywell Morley MI-WSS-PR-N (internal ref: KTI07001001MIPR) is categorized under Harmonized System of Nomenclature (HSN) code 85311020, corresponding to electrical sound or visual fire alarm apparatus.