I would say to really nail this, start a new model on the front plane, draw out the front face of the Tricorder (the one with all the LED "sensors") then simply extrude it back to the desired length.
Then on the side plane, trim away the area the easier segments.
It will give you the most accurate model.
It's quicker than trying to make a box and then cut away the curved sides or use fillets to get the shape.
Good luck.
I just went back and double checked as something looked off.
Not sure why but 1 measurement was wrong, calipers must have slipped or had a blip.
Here is the correct dimension.