This is a UV mirror. It's a mirror that makes areas where you've applied sunscreen appear black. You can use it to check if you've applied sunscreen thoroughly. You can also use it after washing your face to see if you've removed all the sunscreen. I'm selling it because I've only used it a couple of times. Operation has been confirmed. The brightness of the light can be adjusted. Includes: Main unit, instruction manual, UV TEST card. A charging cable is not included, but it can be charged with a Type-C cable you already have. *Shipping method may be changed.