The 75W led therapy cap can decrease pain or headache and may stimulate hair re-growth. Use device 1-2 times per day for at least 4 weeks for maximum effect. The cap uses both deep red light (660nm wavelength) as well as Infrared/near-infrared light (850/940nm). The brightness is adjustable with three different output levels, optionally with a 10 Hz pulse mode. The cap has an integrated timer with a 15-minute auto shut-off. The cap can be plugged into the AC socket or powered by power bank (not included). The product is supplied with a power cord, adaptor, USB Cable and English user manual. Comes in adult size adjustable with a zipper.