7 Color Wireless Led Face and Neck Mask (Home Use)LED face masks contain light sources that promote biochemical reactions in cells, such as increasing collagen synthesis, without causing direct heat damage to the skin. An LED face mask is a skincare tool that employs light emitting diodes to emit precise, non heat light energy onto the skin. This process activates cellular functions that promote healing, skin renewal, and collagen synthesis. Designed like a modern sheet mask, it usually consists of