We know our phones emit a slew of electromagnetic waves, but we never thought they could power another device, let alone be interpreted. Lunecase does just that, drawing on invisible energy emissions to light up LEDs that distinctly identify incoming phone calls and SMS messages, notifying you of this fact before your phone does. It doesn’t use (or even have) batteries, snaps on just like a normal case, and is bound to be particularly well-received by individuals often using silent mode by necessity.

Pledge at Kickstarter – $39