This was a gift from a Chinese acquaintance. I don't know what it is, so please purchase only if you understand. No complaints will be accepted after purchase. Chinese instructions are included. ----------- The following is a reprint from an online shopping site ----------- Easy to carry and convenient This portable LED light beauty device with USB charging function is perfect for skincare on the go. Easy to use This handmade mask is easy to use and a convenient item for your daily skincare routine. Multi-functional skincare device This versatile skincare device provides professional-level skincare, allowing you to achieve glowing skin at home. High-quality materials Made of durable plastic, it provides long-lasting use and reliability to meet your daily skincare needs. LED light skincare Experience the benefits of LED light skincare with this USB mask. This mask is designed to lift and rejuvenate your skin. *The images are also from a Chinese website. I don't know how it works because I haven't used it.