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In summer, many of us use fans to resist hot weather. Fan, a traditional sample tool with energy saving, low-carbon and environmental protection. "Fan-Energy", is a combination of traditional fan and newest technology, which uses the new "piezoelectric materials".The product "Fan-Energy" will save the electrical energy into the inside battery while you shake it.Then you can use its energy to charge your mobile phone and other digital products. You can save the energy while you fan the "Fan-Energy" for cool, meanwhile, you have a battery charger for your portable products.