Measure Fingers!

It is a device that caps your thumb and forefinger (or any 2 fingers) and uses the signals relayed between the two finger points to calculate the measurement.
The Smart Finger is made from silicon to fit to any finger size.
It can help measure length, breadth, and volume in a very intuitive way through simple button operations.
The distance (measurement) is calculated on the basis of the time taken by the signal to beam from one finger tip to the other and back.
The measured distance is displayed through LED and the device sports 2 buttons that help display the measurements in different units, record and store the measurement, calculate volume and area plus view the information in text format (details on how to operate are explained in the images).

It was designed by Choi Hyong-Suk, Jung Ji-hye & Yoo-Jin Park

Click on the picture to better understand the details on how to operate the Smart Finger