311nm Ultraviolet Phototherapy UVB Lamp for Eczema uses a narrow spectrum 311nm technology narrow-band UVB (NBUVB peak 311) light irradiates the skin, can cause a series of photochemical reactions and photobiological reactions, and then produce adjustment. Feature 1. The light source uses a special ultraviolet lamp produced, with high stability and long life. 2. Small size, light weight, simple operation, patients carry around, can be treated at home. 3. High radiation intensity and obvious treatment effect. 4. Reflector is installed inside the irradiator to improve the radiation effect. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin