Omron Hailian Core is not an IQ tax. According to relevant public information, PWTT is far more accurate than simple optical measurement, and blood oxygen is measured regularly, especially during sleep, to ensure that blood oxygen is always at a normal level. Large color screen ECG and blood oxygen HRV smart watch. Sedentary, incoming calls, SMS, APP notifications and reminders are all available, bringing together more than 20 kinds of high-frequency event reminders, which is more effective than the mobile phone reminder function.