The HF3331/60 GoLite Blu LED Energy Light increases energy levels and fights winter blues by using specific blue light like a clear sunny sky. 100% UV free blue light and featuring blue LED technology, the backlit touch-screen display allows adjustments to be made to the four-level light intensity and includes treatment timer and reminder alarm for customized use. With an internal rechargeable battery, the protective case and small, compact design allow for easy portability. Wide treatment field of specific blue light with light intensity dimmer of 4 levels. Easy to use with backlit touch-screen, built-in clock, pause function and treatment reminder alarm. Treatment timer of 1-60 minutes. Includes internal rechargeable battery and protective case. LED lamps with 10,000 hour(s) lifetime.