Wrap one set of the sticky wings around the finger. Adjust the pad as needed—this may mean bending it over the tip of your finger as if it were a tiny hat—and then wrap the second set of wings.

The wearable device wraps like a snug bandage on your finger and is powered by your fingertips’ sweat. Out of all the areas on the human body, sweat is mainly secreted through the fingertips. They ...

Her grandmother, Feng Cheng, 60, secured a bandage with an elastic band around Tue’s finger to try to suppress the blood. Two days later, Tue’s finger became swollen and turned black.

By John Del Signore Published Aug 6, 2014 Modified Aug 6, 2014 Share Never miss a story ...