* Single button controls 5 speed * Rotary knob snaps for installation and dis-assembly * Available needle length: 0~2.5mm * Vertical needle and less pain when treatment * Visual and noticeable improvement in a few days from the first treatment. * Short healing time. * No permanent damage or injury. * No bruising, infection, discoloration or other complications. * Extremely high absorption of any active ingredients. * Almost all skin types can be treated. * Thickens the dermis without damaging or removing epidermis.