无需电源，价格低廉。

No power needed, low price.

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公司也为黑莓智能手机研发一款特殊的外壳，使之无需电源适配器也能充电。

The firm has also developed special "skins" for Blackberry smart-phones, so that they too can be charged without the need for an adaptor.

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由儿科医生研制的婴儿食物研磨器，大略方便，无需电源和电池。

Developed by a pediatrician, the BabySteps Food Mill is simple to use anywhere. NO electricity or batteries needed.

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