This case has the Raspberry and an integrated USB hub, the board takes power source from the same hub and uses it to expand available ports (overall 5+1 ports are free), Power supply is provided from a 5V 1.5A PSU, enough to serve multiple peripherals along with the Raspi. Integrated ethernet connection allows it to connect to the web and usb ports are commonly used for usb storage and a serial to usb adapter (for the serial console).
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Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey