"Luce 4T LED Facial Therapy Wand FEATURES Made of aluminum entireoy, the LUCE 4T spends four types of therapy: Microcurrent Therapy: Uses low-level electrical currents to stimulate the muscles under the skin. This currency is responsible in the direction of the creation of efarin and collagen which keeps skin supple https://www.youtube.com/watch?v=_Rp6jp2Dw14