I have gotta say that Dr. Pen never disappoints with his micro-needling units, and it’s the same for this Ultima A1 model that I was fortunate enough to get to review. It comes with 6 cartridges, for numerous treatments. Do NOT use the same cartridge for more than one treatment. It can be tempting, but never do it! Bacteria is lurking no matter what you do, as this DOES actually go into the epidermis on a deep enough level for infection from reuse to be possible. SOO not worth it!! Using a quality derma-pen like this one can save you THOUSANDS of dollars in the long run! These treatments can help reduce pore size, help with wrinkles & finer lines, maybe even help prevent them, possibly. I definitely, I wish I had this back in my younger days to protect my skin for the here & now, but as they say.. better late than never. It can also help improve skin texture, acne scars & uneven skin tone. This is a quality, well-priced, budget unit, that still possesses the quality in parts of slightly higher-end models. IMPORTANT: The key is to go easy to start, and watch some You Tube videos, as anybody can learn to micro-needle at home, but you should be educated a bit before starting, to avoid any difficulties or complications. Definitely, a sweet buy & a worthy investment for the youth and beauty of your skin, from this moment forward 👍! Thanks again, Dr. Pen! 5 stars! ⭐️⭐️⭐️⭐️⭐️ **I hope my review has been helpful 😊!**