This rechargeable head lamp Atex dimmable from Petzl (zone 2, 22) 1x batt Li-ion incl 55Lm and is for explosion-proof application. 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.