UVC domestic sterilisers - Which Tariff Code?

These could be battery operated or with adaptors.
Products to be imported from China.
Supplier has given Tariff code 8543702090, but I can’t find it on search.
Wouldn’t it fall under 841920… instead?
Assistance truly appreciated.

Just stick with the first 6 digits of the HS code first.
854370 seems a good start and then 9099 .
841920 would not work as it is for Plastic articles and this is clearly an Electrical one.