Could this possibly be the device?

It is... Read the IR event on Nintendo Japan (http://www.nintendo.co.jp/ir/en/library/events/141030/05.html)

"To achieve the visualization of sleep and fatigue, we have formed a business alliance with ResMed, which is headquartered in the U.S. and is the leading corporation in the world that develops, manufactures and markets medical equipment for the treatment, diagnosis and management of Sleep Disordered Breathing, COPD and other chronic diseases. The company operates business in dozens of different countries around the world while its main business is conducted in the U.S. I understand that they have many users in Japan too.

They have now provided Nintendo’s QOL business with the core of the Five “Non” Sensing elements, namely, non-contact sensor measurement technology and sleep condition estimation technology.
ResMed has been contributing to improving patients’ QOL in the medical equipment field by improving their sleep condition, and for Nintendo, a company that develops, manufactures and markets products for the general public, we think this partnership is a good fit as both companies can bring out each other’s strengths"