設計理念： 在延長插座上顯示每個電器所消耗的待機電量，透過此方式可提醒使用者節省耗電，同時透過內建的電力計數器來提醒使用者如何正確地節約能源。 The device displays the amount of electricity being consumed by appliances. Users can easily figure out which socket is in standby mode. The built-in calculator accumulates the power rate and reminds the user to unplug the appliance.