The work on products and EEG became the super topic with a smile super conference, Mimi the cat. necomimi is an extension organ you can catch an EEG of you, to express words faster than your condition. If you grab a sense, the movement of the ear can be controlled by brain waves. I is transmitted the feeling of movement in the ear. Technology has come true, I am pretty, It is the form of the new little communication. 4 AAA alkaline batteries (not included) Product Warranty: Age: 14 years old use the battery to the product of 90 days This, maker certificate is not attached in the policy maker, but 90 days warranty there.