The Neuron Watch was basically like a hypnotist's pocket watch, but with a twist; it would send specific neurons to your brain, depending on what you wanted to change, and only for self-improvement or to help others. You just had to swing it in front of yourself or someone else and when the subject felt a tingle in their mind, they'd specify what they wanted to improve, such as "I want to be more intelligent and efficient" or "I want to learn and remember languages much more quickly and easily." Of course they'd still have to study, but with the neurons in their mind, it would allow them to absorb and store the information away much more quickly and efficiently.
There was one way that it could still work without the subject having to do anything, and that was if the subject couldn't communicate, meaning that babies and mentally-disabled people were often the target audience. In this case, the watch would sense this, the hypnotist would feel the tingle, and they would be able to say the phrase. However it was the hottest item for parents who wanted to create a prodigy child.