What equipment fits in a 4U rack?

Any standard 19-inch rack-mount device, such as a 1U or 2U server, switch, patch panel or shelf. Four units of vertical space means you can stack a few 1U devices or one larger 2U or 3U unit.

Does it come with mounting screws?

The listing gives no details on included hardware. Plan on buying cage nuts and screws separately unless the box states otherwise.

Can it be wall mounted?

Vatrer does not publish wall-mount instructions for this rack. Treat it as a floor or shelf-standing frame unless the manual says otherwise.

How much weight can it hold?

No load rating is published. Keep heavy servers low and avoid filling all four units with dense equipment until you confirm the frame's capacity.

Is it suitable for a home lab?

Yes, if you want a compact open frame for a few devices. It lacks cable management and doors, so you will need to handle airflow and cable routing yourself.