Hello dear, I am happy to answer your question. Dear belongs to the 0901 group of trademark classification Class 9. It belongs to barcode scanning, collection equipment, and barcode scanner guns in office equipment, consumables, and related services. The barcode scanner belongs to the 0901 group of Class 9 of the trademark classification. The main category is the industry with the highest comprehensive proportion of the number of products, transaction value, and transaction volume in your store. It is automatically identified by the system. The calculation cycle is to calculate the data within the past 30 days every day. It cannot be set by the seller. Revise.