Portable speakers model is a detailed ready to smooth 3d model . Apply smooth for better results. Different parts have separate meshes. Speaker file have two styles for front the net. 1. Net created with texture 2. Net created with mesh. You can use both styles .
You can use obj and fbx format to import inside other programs like maya, 3dsmax , Houdini , Blender, C4d , Unity 3d ,unreal and many more .
Check other models as well.