Answer your cellphone even if it’s in the other room. The No Jack base connects to your cell over Bluetooth and sends calls to the two included cordless handsets from across the house. GE No Jack $100; ge.com
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.