For your reference, here are the reasons for the sensor indicator on the Xiaomi Smart Band 10 Ceramic Edition flashing in red when not worn at night:
1. When the Xiaomi Smart Band 10 Ceramic Edition enables [Advanced monitoring] in the sleep settings and [All-day tracking] in the blood oxygen settings, the sensor indicator on the band will flash in red when worn. If you do not wear the device and find the red light flashing, it will be a misdetection of the wearing monitoring function. The Xiaomi Smart Band 10 Ceramic Edition adopts an infrared + green light high-precision PPG heart rate sensor. Compared with traditional wearing monitoring, the monitoring accuracy has been greatly improved. However, when the band is placed in an environment similar to the wrist, misdetection will also occur;
2. When the band is not worn, please avoid blocking the heart rate indicator with any objects (Common misdetection scenarios: The band is placed in a bag, on a bed or table, etc.);
3. If you don’t wear the band during sleep, it is recommended that you disable [Advanced monitoring], which can save the band power.