Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

iF SOCIAL IMPACT PRIZE (free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

2be1 / earphones


2be1 is an earphones which can put together two lines into one line using principle of zipper.
Every people who use earphones must have experienced difficulties by twisted two lines of earphones. They are easily entangled. It takes time and effort to untwist them. What a pity! 2be1 can solve this problem. For listening to the music, what you have to do is pulling down the zipper and separating earphones. After using it, you can easily make it to simple one line by pulling up the zipper.


Kookmin University

Kookmin University
Seoul, South Korea

Doung Jung


Kookmin University

Kookmin University
Seoul, South Korea

Taehyun Kim Sungmin Jin