Renas works by delivering multiple arrays of 1550nm microscopic laser beams to the skin, known as microscopic thermal zones. The treatment eliminates old epidermal pigmented cells and penetrates deep into the dermis, remolding collagen with stratum with microscopic treatment zone and long term regeneration. Dermis fiber thickens, micro wound heals quickly, skin restores smooth after several treatments, and the pigmentation risk is reduced effectively.