Whether you’re going off the grid like Survivorman or just looking for a cool ring that also can tell time (when it’s sunny!) check out the Sundial Ring. It’s the ultimate eco-friendly clocks. The sundial has worked to tell time for thousands of years and it still works today. To tell the time, remove the ring and suspend it from a string (black satin cord is included). Through a tiny hole, a thin ray of sunshine will illuminate a number on the inside of the dial showing the time of day. It’s that easy. No need to get all crazy with sticks in the sand. This is what’s called an Aquitaine or a perforated ring dial style of sundial. Besides giving you the time, it looks pretty badass too.