Specifications: Laser Comb (Comb A) Power Supply AC220V/50HZ AC110V/60Hz Laser Production 2000uw/cm2 Charge Time 6 hours Rechargeable Battery 2.4V/600mA Lotion-Infusing Comb (Comb B) Power Supply AC220V/50HZ AC110V/60Hz Vibrating Speed 5000~8500RPM Rechargeable Battery 2.4V/600mA SINOHEALTH Laser Comb User Benefits An increase in the thickness of hair shafts Faster growing hair Darkening of the hair to their natural color (less gray) An increase in tensile strength (less breakage) Improved manageability and shine Improved condition Less dandruff, irritation and scalp itch 8 Reasons Why You Will Love Sinohealth Laser Comb 1) Grows more hair! 2) Easy to use. 3) Complies with International laser product safety standards. 4) Convenient home treatment. No more traveling to hair care clinics. 5) Thicker, fuller, healthier hair. 6) Improves hair condition. Increases hair shine, bounce and manageability. Eliminates dandruff and scalp itch. 7) Use worldwide. Designed to be equipped with interchangeable power transformers. 8) Attractive ergonomic design with high-tech feel. Designed to fit the hand like a brush.