Fin is a bluetooth ring that lets you control things with your hands

Fin, a bluetooth smart ring, that will let you use gestures on your palm to control your smartphone, TV, car stereo or any other connected device, being developed by Kochi-based RHL Vision, has reached its funding goal on Indiegogo. The ring that needs to be worn on your thumb can be swiped on various parts of your hand to control various devices around you. It uses sensors that can uniquely identify each part of your hand to achieve this.