Red light hair cap is a hair loss treatment and hair growth equipment, which mainly stimulates weakened hair follicles in a painless way, strengthens the growth vitality of hair follicles, and then promotes healthy hair growth The device includes infrared 830nm and red 660nm LEDs. The red hair cap is specially designed to treat hair loss, hairline shrinkage, baldness and thinning, and stimulate hair regeneration. Operating Temperature: 0anddeg C to and 27anddeg C (32anddeg F - 80anddeg F) Relative Humi-di-ty: 85 percent Storage Temperature Range: -30anddeg C to and55anddeg C(-22anddeg F to and130anddeg F) Power: DC5V 2A Package Includes: 1xHair Growth Cap 1xUSB Cable 1xManual Features: 1. Two Wavelengths of Light: Infrared LED 830nm, RED LED 660nm. 60pcs 670nm red light beads, 60pcs 830nm infrared light beads, a total of 120 light beads. 2. Lightweight and Portable: Foldable, it's lightweight at only 140g (4.8oz). 3. Convex optical design: The convex lamp beads can make the light more concentrated and make the light travel in a straight line. It can reach the hair follicles of l-3mm, activate the hair follicle, and let it re-enter a healthy growth phase. Pure physical therapy with no side effects. 4. Automatic timing function: Automatically shut down after 20 minutes of power on, do not worry about excessive treatment. If you need to pause during use, you can long-press the switch to turn it off. It is recommended to use it for 20 minutes each time, 3-4 times a week. 5. 10Hz and 40Hz Pulse Mode: 10Hz Pulse Mode helps induce brainwave entrainment and 40Hz pulse mode helps restore the brainwaves to a natureal order. Instructions: 1.The product connects to the controller 2.Plug in the power cord 3.Long press the switch over 4 seconds to turn it on 4.Put the cap on the head and enjoy red light therapy.