Want to have the most accurate time ever on your wrist? Then you'll like this: a wristwatch on Kickstarter called the Cesium 133.

The watch was named after the atomic element that fuels its oscillator. It is an atomic clock you can wear and while it is not as accurate as the massive atomic clock the US government has, this one here will lose only a single second every 300 million years.

There will only be ten of these watches and it will cost $6,000 for each. And they've all been spoken for already.

Via Kickstarter