Red Light Therapy Cap with Built in Battery Portable Use
Wavelength: 660nm (hair growth) or 660+850nm combination (deep repair)
Power density: 50-100mW/cm² (clinically effective and safe)
Portability and comfort
Lightweight: weight <500g, built-in lithium battery (lifetime 30-60 minutes).
Adjustable head circumference: adapt to different head shapes, breathable material to avoid stuffiness