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The Petzl NAO headlamp features REACTIVE technology to automatically adapt light output on-the-run while also helping improve battery life. A sensor analyzes ambient light and proximity of objects in your path to adjust in real-time beam shape and brightness of 2 high output LED's from ultra-bright 355 max to 7 lumens. Customize settings on your computer to make NAO fit your needs for brightness and battery life. If you want, switch to constant mode for traditional headlamp function; Li-Ion battery recharges simply via standard USB.

*Watch a Video of the NAO In Action!

**See the Graph Explaining Benefit of NAO's Reactive Lighting

Colors and Weight

  • White/Black
  • 187g including battery


2 High-Output LED's
Setting Max Brightness
Burn Time
Reactive #1 355 lumens 108m 4.6 hours avg
Reactive #2 98 lumens 55m 8 hours avg
Constant #1 315 lumens 93m 1.3 hours
Constant #2 88 lumens 48m 8 hours
  • 2 high-output LED's shine at ultra-bright 355 lumens for vision up to 108m (354 feet) ahead
  • REACTIVE LIGHTING mode automatically adjusts lighting in real-time via built-in sensor; helps increase burn-time with hands-free lighting adjustments
  • Constant lighting mode for traditional headlamp push-button function
  • REACTIVE and Constant modes each have 2 levels to choose from to balance light and burn-time needs
  • Multifunction on/off switch can be locked to avoid accidentally turning lamp on while stored
  • Customize lighting via OS by Petzl software to change light intensity, time and distance
  • Register up to 4 activity profiles on the headlamp
  • Create up to 5 levels per lighting mode
  • Create and share personalized headlamp profiles
  • Lithium-Ion battery recharges easily via standard USB; performs well in cold conditions
  • Battery life about 300 cycles (capacity approximately 30% lower than original after 300 cycles)
  • Also compatible with AAA/LR03 batteries at decreased performance
  • Battery charge indicator lets you know remaining battery power
  • Adjustable soft ZEPHYR headband and straps
  • Top strap included for increased stability if needed (removable)
  • Included 30 cm USB cable for computer connection
  • Water-resistant (IPX4)

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