This smart head ring is used for the health management of the elderly. In order to prevent stroke, cerebral infarction and other common sudden diseases of the elderly, the elderly just need to take it with them. Children who are far away can also view various real-time health data through the APP. In case of sudden abnormalities, there will be a warning function of "alarm". The structural design is used to comprehensively upgrade the "product structure" and "user experience", so as to simplify the use of the product and minimize the use burden of the elderly. The radian of the head ring, combined with the ergonomic development, is nearly perfect. With the design of the telescopic rods on both sides, the head ring is not easy to slip off, and is suitable for a variety of head circumferences. It can also make the electrodes close to the skin, making the data more accurate!