Petzl Nao w/Kit Belt One Size E36R10 2B. .. With the NAO + belt kit the NAO +'s rechargeable battery can be put in a pocket or on a belt to reduce the weight on the head. In winter this system protects the rechargeable battery from cold and thus increases its burn time. Specifications for Petzl Nao w/Kit Belt: Manufacturer: Petzl Weight: 59 g Last Chance: Yes Size: One Size Features of Petzl Nao w/Kit Belt 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... Package Contents: Petzl Nao w/Kit Belt Petzl E36R10 2B: Nao w/Kit Belt One Size