Specification: The product uses rechargeable batteries! ! Insert: Type-C LED power: 25mW (piece) Material: PU+fabric Number of LEDs: 96 Size: 227.7*207.5*8.3mm feature: The two red light wave products use 96 LED lamp beads, emitting wavelengths of 660nm & 850nm red light. According to research, different wavelengths of light have different effects on the skin. Near-infrared rays can promote skin metabolism, eliminate inflammation, improve hair follicle blood circulation, and protect hair. Light board material - The light board is composed of skin-friendly material PU and non-woven fabric. It is light weight, easy to use and installed in the hat. Multifunctional timing device - The hair generator has 4 modes of adjustment, 10-minute and 25-minute timing devices, allowing you to use it easily even while sleeping, without worrying about excessive exposure to physical therapy. how to use? 1) Press and hold the on/off button for more than 2 seconds to turn on/off 2) Press the "M" key to switch usage modes: Package Included: 1 USB plug cable 1* infrared cap 1*gift box notes: 1) This red light therapy cap is a plug-in design (the package includes a USB plug cable) and can be connected to a mobile power supply. 2) 10 minutes is the best time for daily use, and the hair cap timing device is 10 minutes.