Ledlenser NEO6R Headlamp is quick to charge and start thanks to the micro USB and lithium ion battery The headlamp features sporty design and light weight of 95 grams This headlamp has Constant Current Mode provides you with constant light until you are done running This headlamp has 3 light functions: Power, Low Power, Blink The headlamp has front switch and 2 special functions: Rear light & Transportation lock This headlamp has 2 energy management: Low battery warning & Charge indicator IP ratings define the protection of the products against the penetration of foreign particles (mainly dust, dirt) and water This headlamp is powered by 1 x Polymer 3.7V The headlamp has 1 x power LED, 240 lumens and a maximum lighting range of 30 meters