Product: Necomimi Brain Wave Cat Ears Novelty, One Color Specifications Dimension: 4 x 8 x 4 inches Weight: 1.1 lbs Recommended age:  15-16 years Batteries: AAA batteries (4 pieces) Description: One pair of white cat ears Emotions move the ears Easy to operate With light touch sensors on the forehead and ear Uses 4 AAA batteries Research grade technology The Necomimi Brainwave Cat Ears is a pair of motorized cat ears that comes with a brainwave sensor. The motorized cat ears can be moved by way of light touch sensors that signal it to turn up or down depending on the mood of the wearer. CHECK LATEST PRICE   Thank you to all our supporters       The Review Appearance and Design Appearance wise, the Necomimi is as kawaii as it can get. The cat ears are kind of big than the usual stuff you see around online, and it’s fluffy and fuzzy. The cat ears are secured on two blocks on each end of a headband. It is removable, and you can replace it with dog ears or even devil horns. The ears’ movements are controlled by your brain activity, by way of the sensor found on the forehead area and that found on the left ear. Four pieces of AAA batteries are required to make this cat ears work. The Necomimi is slightly heavy, also in part because of the batteries, but it can be adjusted to fit your head size and you will eventually get used to it, hopefully. Feedback from most of its users though mentions of a slight buzzing sound once the headband is turned on. Depending on your sensitivity, you might find the slight buzz relaxing or annoying. Brain Wave Reading The highlight of the Necomimi Cat Ears is its ability to respond to mood via your brain waves. For example, if you’re focused, the ears tend to perk up and move fast. On the other hand, when you’re relaxed, the ears droop. However, this is as far as the ears can do, as it does not directly respond to your brain waves. Pros The technology on which the toy is marketed actually works. In the realm of cat ears toys and other motorized toys, the Necomimi Cat Ears is really unique. It can be used for various purposes, but it’s great for cosplays too. The Necomimi has a beautiful packaging and comes with detailed instructions. Cons While the toy is interesting, it is quite expensive. Several feedback from customers also mentions that the Necomimi breaks easily that’s why it is advised not to wear the cat ears when you’re in the car. It cannot be used for long periods of hours because the motors can die on you and you need a frequent change of batteries. The electrodes for the sensors can be a bit challenging to position properly. Also, a common problem for those who got the Necomimi is that the ear clips broke easily, partially because of the spring in the clip. Some who bought the cat ears complain about the headband because it was quite small and can cause a slight headache. However, this may be on a case-to-case basis. CHECK LATEST PRICE Bottom Line The Necomimi Brainwave Cat Ears really works well, and it’s a fun accessory you can wear to parties and cosplays or just to grab some attention! Nevertheless, its price tag is a bit high even for a pair of wiggling cat ears! Production of the Necomimi Brainwave Cat Ears has been discontinued by the manufacturer, but this product is still available at Amazon.