During the Google I/O conference in San Francisco Google Advanced Technologies and Products (ATAP) group revealed what was designed quietly. Project Soli is developing a new interaction sensor using radar technology. The sensor can track sub-millimeter motions at high speed and accuracy. It fits onto a chip, can be produced at scale and built into small devices and everyday objects. Project Soli is really a radar that is small enough to fit into even the smallest wearables. The small radar picks up on your movements in real-time, and uses movements you make to alter its signal. It’s a lot like Leap Motion and other gesture-tracking controllers. But instead of using cameras, Project Soli uses radar technology that fits within a tiny chip.