Anyway the Byakugan does allow the user opportunity to strike better with the hyuga technique, not saying its "Part" of the Byakugan like how regular sharingan technique operate like use to offense.
Other than that the byakugan has 360 vision, telescopic vision, long-range vision, chakra sensory capabilities, vast focus abilities and resist to Genjutsu
Other than that the byakugan has 360 vision, telescopic vision, long-range vision, chakra sensory capabilities, vast focus abilities and resist to Genjutsu