I am building controllers using a raspberry pi 3 and used jumpers to connect to the pi until I found these. The circuit boards are very well designed, every hole is soldered and ready for soldering. All external connections to relays, opp, ph, tds and others are jumpered onto this small board. This makes it easy to service the Pi, including swapping it out. It was so easy that I rebuilt another controller with this board. I will never create a Pi project again without this board. The plugs are not soldered, but as I said, they are very well made and so easy to solder that it is very easy to do.
Neural Compute Stick 2 by Intel
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Complete Kuman Raspberry Pi 4B 3B+ Kit: Breadboard, Expansion Board, Jumper Cables, Ribbon Cable, Resistance Pack
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