This is a case to cover the sides and back of the Zeeweii DSO154Pro portable oscilloscope. It's meant to be pressure-fit, so you may need to adjust dimensions by 0.1 or 0.2mm depending on your printer's tolerances. There's also a small cap to cover the exposed GND and signal generator pins.
The case was modeled from scratch, but the dimensions were taken from this excellent snap-fit design by ARM_02 on Thingiverse: https://www.thingiverse.com/thing:6074806
The author marked this model as their own original creation.