This box is designed to include :
-Raspberry Pi 3B
-Relay:
https://www.amazon.de/AZDelivery-1-Relais-KY-019-Low-Level-Trigger-Arduino/dp/B07FNGCSZQ/ref=sr_1_6?__mk_de_DE=%C3%85M%C3%85%C5%BD
-5V power supply:
https://www.amazon.de/gp/product/B00MWQD43U/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
-AC plug:
https://www.amazon.de/gp/product/B000L12R5E/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The author marked this model as their own original creation.