Forget Google Glass, Android Wear, Smartwatches or contact lenses that give you night vision. Instead let’s talk about the awesomeness that is this 17th century Chinese abacus ring. It’s wearable tech from the Qing Dynasty, perhaps the world’s oldest smart ring.
Measuring a mere 1.2 centimeter-long by 0.7 centimeter-wide, the miniature abacus is a fully functional counting tool, but it’s so tiny that using it requires an equally dainty tool, such as a pin, to manipulate the beads, which are each less than one millimeter long.
“However, this is no problem for this abacus’s primary user—the ancient Chinese lady, for she only needs to pick one from her many hairpins.”