For the LightWave 3D version (the original), geometry is a mix of polygon and subdivision surfaces. The buttons are separate layers for easy animation. The LEDs look great on or off; just add 150% luminosity to turn them on.
The OBJ and 3DS versions consist only of triangles, with subdivisions frozen. For OBJ and 3DS, two versions are supplied; medium detail and high detail. The only differences are in the screw and the keys, where subD's were used and frozen at different levels in these exports (level 1 and 4, respectively). For most purposes, the medium version is fine. These versions are 7566/5194 and 30612/17191 polygons/vertices, respectively.
In the OBJ and 3DS versions, there are two files for each of the two detail levels; one provides the keys and the other provides the remainder. Since the keys are spaced generously, it should be easy to separate them into layers within the 3D package of your choice, if you need to do so for animation.
NOTE: The OBJ version does not have the material settings. It still has the texture image and UV mappings for it, and all material assignments are intact, so it should be straightforward to colour it to your liking in your 3D package of choice.
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