Product type	Where to look
Computers, Printers & Office	Printers usually have the label inside the front access door or on the back. Laptops have it on the underside. Monitors put it on the back panel near the stand.
Game Consoles	Consoles print the model on a label on the back or bottom. The system settings also list it.
Headphones & Speakers	Earbuds print a small model code inside the charging case lid or on the stem. Headphones use the inside of the headband.

Getting the official Logitech manual

Logitech publishes product documentation on support.logi.com. Search there with the full model number from the label, then look for a documents, manuals or downloads section on the product page.

If your model isn't listed, try removing the last few characters, which usually only indicate color or region. For discontinued models, look for an archive or legacy products section, or contact Logitech support directly.