敲‧鍵盤【POWER'store】 電腦已被廣泛的使用，不論是工作、求學、溝通、行動等，甚至一整天都必須與電腦相處，使用電腦的時間一天長達 7 個小時，打字溝通已是現今與世界聯絡溝通的方式之一，利用我們的使用動作將平時簡單的操作產生電能並且儲存電能，提供4C產品充電使用，也提供備用儲電盒可將儲存的電帶走。 piezoelectric=壓電效應 【POWER'store】 The computer is widely used in our work, learning, communication and other activities; we may even have to use computers for up to seven hours a day because typing words on computers is one of the major means by which we communicate in the world; the power generated by our daily simple computer operations is stored for charging the 4C products. The stored power may be transferred into the backup power storage box.