How does the Liascy HyaloVitality Microdarts Roller works? Liascy HyaloVitality Microdarts Roller works effectively on acne and acne scars by utilizing micro-needles to penetrate the skin. These tiny, gentle needles deliver hyaluronic acid, which plays a crucial role in smoothing and plumping the skin. The hyaluronic acid works wonders by providing hydration and deep moisturization, effectively treating acne scars and reducing redness in the skin. Benefits: OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.