Simply a different case for the Ahoy-dtu. The bottom part is simply fixed to the top part with a little glue or tape. However, it is also quite absorbent, sometimes it is not necessary depending on the setting.

The piece can either be fixed on the table or hung on the wall using the hole on the back. (don´t forget to switch the display oreientation)

Photos are from the first attempt ;-)

It is important that the electronics must be installed to save space. I fixed everything with some hot glue.

I used a WeMos D1 Mini with USB-C, an SSD1306 0.96" Display and an NRF24L01+ SMD.

Have fun with it :)