Monorean: rice-grain-sized spy earphones

Monorean launches the smallest headphone for exams.

How do they work

Monorean -

these are miniature headphones designed forcheating on tests and exams. They work in exactly the same way as any other similar devices - just connect them to your smartphone via Bluetooth and call the right person. Monorean are easy to attach and do not fall out of ears when tilted.

Headphones themselves can be bought for 349 euros atofficial site. For the most advanced, there is a Monorean Pro kit for 549 euros, which includes an inductive collar, the thickness of a sheet of paper. With it, you can quietly accept an incoming call or switch an MP3 file.

Source: Monorean