With 430 lumens, the Duo Z2 has extremely high luminosity. It's waterproof for approximately 30 minutes in fresh water up to a depth of 1 meter, battery-powered, and extremely robust. This makes it ideal for demanding outdoor sports like speleology and orienteering. The Duo Z2 features Petzl's patented Face2Face anti-glare function to prevent dazzling others, facilitating easier group movement. It offers five light modes, from a wide cone with low and long luminosity to a boost mode for short-term maximum luminosity of 430 lumens. The lamp has a large, ergonomic switch, easy to operate even with gloves. An electronic lock prevents unintentional switching on during transport. The battery housing on the back of the head provides balanced weight distribution. If the battery is low after a long tour, the Duo S automatically switches to reserve mode. Constant Lighting ensures luminous intensity doesn't change during the specified light duration; it's below the maximum value when the lamp is switched on. At the end of the light duration, the lamp automatically switches to reserve mode with reduced luminosity. This headlamp operates on 4 AA, LR06 batteries, is certified for hazardous areas (ATEX, Zone 2/22), has an IP67 rating, and weighs 360g with batteries. The colour is Black, Yellow, with MPN: E80AHB.