Do not think that the hasp on the shoulder strap is just an eye-catching accessory. It can also adjust strap length, so that you can use it as a shoulder bag or messenger bag!

别以为肩带上的搭扣只是抢眼配饰，它更可以调解肩带长短，手拎或单肩任你选择！

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Use the buckles under the chest strap to adjust your leg straps; make sure to do it in a symmetrical way.

通过胸口皮带的扣环来调整腿部皮带以保证用一种对称的方式来调整。

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Adjust the strap length as desired.

调整背带到所需长度。

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The Nao also has all of the features of its less advanced counterparts: water resistance, a comfortable and easy-to-adjust strap and a rechargeable Li-ion battery that, in a pinch, can be swapped out easily for two AAA batteries.

WSJ: The Petzl Nao: A Smarter Light | At Play