OUTDOORS AND INDOORS: Not only can it guide your way ,but also it can enrich your experience. PREMIUM SWITCH AND BRIGHT LAMP : Adopts the upper material avoiding stroboflash and open times add up to above one hundred thousand . No Emit heat. Protect eyes more carefully. PORTABLEćAJUSTABLE: Easily carry . You can tie in your head or neck. Keep press to adjust the visibility as you need . it needed assemble AAA batteries . DAILY WATERPROOF: Normal wear and tear . BATTERIES REQUIRED :AAA batteries(Not included in package).