By a sensor that is placed on the forehead, the device measures brain waves and ears move accordingly.
For relaxation, the ears are more on the side and with zunehmnender attention to make the ears. They can even twitch.
The engine, the ears moved audibly, at least for the wearer. My feeling but did not interfere.
The sensor on the Stirm easy to conceal by a pony.
In the battery compartment on the ear looks a bit different:
Because sitting in the box 4 AAA batteries this is correspondingly large. If you want to cover it with hair, you have these auftoupieren something so that you not only on one side as a "Haarknäul". But even that is possible.
You can also sew or stitch up caps, so they have slits for the ears and at the same time cover the box. This is also already on sale on etsy.
So far, the ears are only available in white, later there will be more choices. But on the Internet there are already some people who make coatings for the ears. The ears can be peeled off of the headboard and you can easily pull the rubber mold from the fabric cover, so that a change of the skin is not a problem.
I like these very ears and they are a real eye-catcher.