Feature: 1. Aim at nonscarring alopecia, androgenic alopecia, postpartum alopecia, thinning hair, backward hairline, etc. 2. Enhance and improve hair follicle blood circulation and metabolism, prevent hair loss and promote hair growth. 3. High energy, can regulate oil secretion, care for scalp and hair follicles, create a good hair growth environment. 4. 3 gears energy adjustment, you can regulate it according to needs. 5. No UV, adjustable brightness, multiple gears dimming, bring you convenience. 6. The machine emits a lot of heat during use, which can reach a temperature of 3045C, match with red light, to achieve physiotherapy effect. Parameter: 1. LED quantity: 48PCS (25mW-LED chip) 2. Input voltage AC 100-240V ,output voltage DC 5V 0.5A 3. External battery: not supported 4. Shell material: OK cloth + TPU 5. Optical power: 25mw 6. Size: 227.7*207.5*8.3mm 7. Spectrum: 660:850 8. Weight: 0.6kg 9. Maximum actual power: 25mW/pc 10. Power socket: USB The principle of the laser hair growth : It promotes the absorption of nutrients in the scalp by emitting a soft laser. After the laser acts on the skin of the head, it can stimulate the heat in the skin, expand blood vessels, and accelerate the blood circulation of the scalp. The result of this is to bring more nutrients to the hair. The soft laser can also kill germs, kill fungi hidden deep in hair follicles, dredge sebaceous glands, and reduce oil secretion. It can penetrate into the hair follicles in the dermis of the scalp and increase the activity of hair follicles. It has a stimulating effect on hair follicles, which can activate hair follicles and make hair follicles more active.