The biggest difficulty of this hardware product is several problems at the scalp collection site:

• including hair blocking the contact with the scalp, insufficient packaging and pressure of the EEG cap, and the influence of the surrounding environment causing the electrodes and scalp to be unable to fully contact each other. The noise is high;

• the conductivity of different electrode materials has different effects. Collect signal strength;

• unclean hair caused by electrode material, wrapping pressure and wearable discomfort affect the user experience.

These three problems are currently like an impossible triangle that cannot be solved at the same time:

• the ideal angle of entry should be that the conductive material has good conductivity, can penetrate hair, and does not require cleaning (disposable use is of course more in line with current consumption) (users’ expectations for cleaning products);

• in order to prioritize user experience, the compromise that can be made is to change the electrode collection position. The positions behind the ears and in front of the forehead are the main collection positions defined by mature products in the market.

It is not difficult to determine the data transmission and battery modules of ordinary hardware products. When the scene is clear, it can be quickly defined through simple calculations.

I finally gave up on this product because it did not have enough commercial viability:

• as a monitoring product, it can only provide data insights and reflections from a data perspective, but cannot actually solve the problem;

• the two most mature products on the market are for sleep and attention. Parents may pay for monitoring and attention monitoring. There are too many alternative products for sleep monitoring. Doing sleep research solely from the perspective of EEG

• is too simple and complicated; body alarms play a role, and cardiac arrest monitoring is obviously more important than brain activity monitoring. , and should be used more at home, as can be seen from the ICU machines;

• microcurrent stimulation, which may have emotional and cognitive treatments, is still in the laboratory research stage, and will definitely be a toB product when mature.