I designed this case to hold a temperature/humidity meter display inside my Ikea Lack enclosure.
I got the meter here:
https://www.banggood.com/Excellway-Mini-Embedded-LCD-Digital-Display-Temperature-Humidity-Meter-Cordless-Thermometer-Hygrometer-p-1465229.html
But it can be purchased on many other websites.
On request, I have added an extra design without screwholes.
The author hasn't provided the model origin yet.