·Allows the rechargeable battery for the NAO + headlamp to be moved, thanks to:
- a 106.5 cm extension cord
- a clip for attaching the rechargeable battery to a belt, a backpack...
·Weight on the head is reduced to 130 g
·Increases battery life by keeping the rechargeable battery in a pocket, protected from cold
·Ideal for trail running, cross-country skiing, mountaineering...
Weight: 59 g.