portable uvb ptherapy with 311nm narrow band handheld ultraviolet ptherapy device for vitiligo and psoriasis

308nm single wavelength excimer light output via the medium xeci. targeted treatments, maximum protection of healthy skin,high dose, highly effective and fast results multiple spot sized output windows to meet different body parts treatment damand in clinic practice no replacement consumables, low maintenance cost,user-friendly interface, convenient and easy to operate 308 light, which is used to treat vitiligo, is essentially 308 nanometers of single wavelength ultraviolet light. compared with traditional methods,.syi