Tested and working. I used this until a few years ago, but I'm selling it now because I no longer use it. It has been stored in a dark place, but please understand that it is a used item and has been stored by a private individual before purchasing. It is generally yellowed. There is no instruction manual. Rechargeable facial device with LED function Settings: LOW / HIGH / 1C / 2C / 3C Model: MEGA BEAUTY L×H Function: With LED function Power supply: Rechargeable Settings: LOW / HIGH / 1C / 2C / 3C / POWER Available for immediate purchase.