Feature: 1. Designed for nonscarring alopecia, androgenic alopecia, postpartum hair thinning, and receding hairline. 2. Helps enhance hair follicle blood circulation and metabolism to support hair retention and growth. 3. Delivers high energy to help regulate scalp oil secretion, care for scalp and hair follicles, and support a healthy hair growth environment. 4. Features 3 energy levels for adjustable intensity based on individual needs. 5. No UV emission, with adjustable brightness and multiple dimming levels for user convenience. 6. Generates heat during operation, reaching a temperature that works with red light to support a 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 helps promote nutrient absorption in the scalp by emitting low-level laser light. When the laser interacts with the scalp, it may stimulate localized circulation, dilate blood vessels, and support improved blood flow. This process may help deliver nutrients to hair follicles. The laser may also support follicle health by helping to maintain clean sebaceous glands and reducing excess oil. It can reach the dermal layer of the scalp to support hair follicle activity. This stimulation may help maintain active hair follicles and support healthy hair growth.