· The laser hair growth cap is a dome shaped low-level laser therapy (LLLT) device designed to promote hair growth in both women and men by exposing the entire scalp to photobiological stimulation with 650nm and 5mW laser diodes.· The Cap is designed with an outer plastic cover and a protective inner liner (containing the electronics and laser array) and is powered by an included battery pack.· Recommended single treatment time is 30 minutes, 3 times per week, or according to your physician's instruction.· Dimension (L*W*H):22*18*9 cm Weight: TW080: 0.25 kg