EXO HAIR Red Light LED Hair Brush. Benefits: By improving scalp health, enhancing circulation and energizing follicular cells, this non-invasive, handheld brush can also supercharge your hair growth efforts by maximizing the absorption of topical treatments.. As part of the EXO HAIR Regimen, the EXO LIGHT BRUSH works in synergy with EXO ACTIVATE and EXO FORTIFY, amplifying their effectiveness and accelerating visible results.. Features: Red Light (650 nm): promotes hair growth and reduces further loss from androgenetic alopecia. Blue Light (465 nm): has been shown to improve the condition of the scalp, promoting a healthier environment for hair growth. Soft silicone bristles: Designed to gently massage without tangling or breakage. Rechargeable lithium battery: Lasts 12 weeks per charge. 15- to 20-minute treatment time: Built-in timer with auto shut-off at 30 minutes. :