Monorean has introduced the smallest headphones for cheating in exams.
How do they work
Monorean -
The headphones themselves can be bought for 349 euros atofficial website. For the most advanced, there is the Monorean Pro kit for €549, which includes a paper-thin inductive collar. With it, you can discreetly accept an incoming call or switch an MP3 file.
Source: Monorean