Flip your mouse over. Look for a sticker near the bottom, battery compartment, or barcode area. 👉 The S/N is usually 10–17 digits (may start with “S/N”).
Check Logitech’s official support page or reach out to them with proof of purchase. how to check logitech mouse serial number
Remove the cover and/or batteries. The number is often hidden underneath. Flip your mouse over