Now here’s a cool gadget. The Energy Detective (TED) continuously measures the electricity consumption of your entire home, helping you conserve energy and lower your bills. TED gives you household usage in real time as well as a projection of your monthly bill. According to the company, you’ll save 15 to 20 percent on each bill. And with prices ranging from $139.95 to $209.95, TED is relatively inexpensive. This is one gadget purchase well worth considering.