what you mean? The screens or the outerbevel of the thing?
The screens look like a innershadow to me, however probably not the way he did it, standard options are kind of ugly and un-professional. The best way to do it is to ctrl+click on the layer with the screen, create a new layer all on the top of them all, then fill the layer with black. (Do this when you still have the shape of the screen ed.)
Then contract the ion by a pixel or 5, depending on how big you want the shadow to be. Now you should have a round shape of black and a few pixels from the edge a ion, stay on the same layer and feather the thing by 5-6 pixels, then . That should work, if the shadow is too blury you have to feather it with less pixels, if the shadow is to big in size you have to contrast it a little, just mess arround a bit and you will get there