Electric Phototherapy Comb: • Massage Comb for Men and Women: This 3-in-1 comb with 28 soft silicone massage contacts promotes blood circulation and helps awaken the scalp. •Vibration Massage: Massages the scalp with a vibration frequency of 6000 rpm, relaxing muscles and relieving fatigue, stimulating cell activity and promoting nutrition absorption. •Blue light therapy (400-480nm): stimulates hair follicle and controls oil level, anti-inflammatory effect, relaxes and soothes scalp skin, promotes hair health, improves hair quality. •Red light therapy (620-760 nm): Improve your blood circulation, so that oxygen and nutrients can be sent to the hair follicle, promote collagen growth and slow down hair loss. •Compact and Portable: The phototherapy scalp massager comb with built-in battery is USB rechargeable; its compact and lightweight size allows you to carry it around for use anytime, anywhere. •Includes USB charging cable. Frequency of use: 2-4 times/day. Serving time: 5-10 minutes for each time. Power supply: built-in battery, USB rechargeable. ABS, silicone, metal alloy.