This rechargeable head lamp dimmable from Petzl (TacTikka) 1x batt Li-ion incl 450Lm 90m and is for professional use. This lamp ensures that you have your hands free and directs the beam where you look. Petzl manufactures very qualitative, innovative headlamps. Wearing a headlamp on your head is very practical and common today. 30 years ago (Petlz invention) is was not. Since then, Petzls have become increasingly light, compact, durable and powerful.