1. Status indicator
AOV status: the indicator is not on
2. Normality
The device does not wake up preview: the blue light is always on
Preview state after device wakes up: blue light blinks
3. Low battery state
Device wake-up: red light flashes
4. Charging indicator
On the small charging board, near the DIP switch, it is controlled by hardware. The green light is on when charging, and the green light turns off when it is full