How does the vital injector work to improve skin

The principle of vital injector is through the vacuum technology before microneedles into the sound,
press the skin slightly raised, in dermal 1.28mm depth of into the skin needed nutrients,
after entry into the dermis, and cells occurred hydration, continuously diluted and absorption.
So the vital injection can be maintained for a limited time.
The skin is dry, but neglected to keep a relatively short period of time.