Asset Overview
Freebie - Game Art: Vintage Fuse Box, Low Poly, PBR Maps 4K
3DS Max, Marmoset, Quixel, Photoshop
The 3D Model has the shading build at vertex level. For this matter it should be imported in your 3D Software, Game Engine without smoothing groups.
For example in UE4 - Import Normals and Tangents
Cheers!