660nm 850nm LED Infrared Red Light Therapy Cap, Hair Loss and Regrowth Treatment Helmet Lamp Beads: 97 (660:850=1:1) 97 dual chip lamps, one lamp has both 660nm and 850nm chips The cap is 20cm in diameter * 14cm in height and 210g in net weight Suitable for head circumference: 60-65cm How to use Take a break after 30 minutes to rehydrate. Step 1 Turn on, select brightness level. Step 2 Choose your mode. Step 3 Put on the cap. Step 4 Charge after use. The red light therapy cap includes 4 working modes: Normal mode: Red light and infrared light work at the same time. Red light may help relieve headaches and support sleep quality; infrared light may penetrate the scalp, reach deep cell tissue, help relax the mind and support hair growth. Breathing mode: A gentle treatment with rhythmic light patterns to support blood circulation in the head, help relax head muscles and relieve head tension. 10Hz pulse mode: Flashes 10 times per second, which may support dopamine levels and help improve mood and cognitive function. 40Hz pulse mode: Flashes 40 times per second, designed to stimulate the cerebral cortex, enhance treatment effects, support photobiomodulation and promote hair growth. Instructions for use: 1. Put on the LED light therapy hat. 2. Plug the power adapter into the socket. 3. Press and hold the power button to start the device. 4. You can only see the red LEDs: the others are in the infrared light spectrum and are not visible to the human eye. 5. The treatment time is 30 minutes, after 30 minutes it turns off automatically. The device can be used multiple times per day. 6. To stop the device, press and hold the on/off button at any time.