These disposable microneedles are not pre-filled with essences. You need to buy them separately and use them with the appropriate essences. How to use: 1. Choose a suitable microneedle head (such as 12 needles, 36 needles, nano needles, etc.). 2. Clean your skin and apply an appropriate amount of professional microneedle essence (such as hyaluronic acid, VC essence, collagen essence, etc.). 3. Use Dr. Pen Ultima M8 for microneedle care to make the essence penetrate better. 4. After the operation, you can apply restorative skin care products to help soothe the skin. ⚠️ Note: Please use non-irritating, alcohol-free skin care products, and avoid products containing acids (such as fruit acid, salicylic acid) to reduce irritation and discomfort.