Some remarks about the mini 2 port RJ45 network manual switch in my mailbag 2023 Q4-4 post
Why did i not use a normal switch or router so i could connect two network devices at the same time.
Yes if you want to operate multiple network devices at the same time other (most times better) options are available!
However i did buy it for special applications.
The manual switch is relative cheap (i did pay Euro 3.45) and can also be used for other things
You can switch anything that goes over the wires, not only network (using an adapter to RJ45). Also you get a real physical separation of a device when disconnecting. Below some more picture of this device.