LED Hair Growth Comb uses pulsed light technology for better absorption of cosmetic ingredients, with red and magenta LED to stimulate hair growth (red) and manage water/oil production (magenta). Combines four proven hair-growth stimulating modalities – LED light therapy, radio frequency, electrotherapy and electroporation. Presents a refillable serum-well for use with any hair growth serum of your choice. Most users experience significant new hair growth in 2-3 months!🌟 #hairgrowthtips