Reolink Argus 2 User Manual page 35

Color
Red
Blue Wi-Fi Connection is successful
Note:
The LED light will flash every 20 seconds when the camera is in the standby status.
Spotlight
When an alarm event is detected, it will be automatically turned on, and the
spotlight can also add light sources to produce full-color images. It's only
applicable for model Argus 3 and Argus 3 Pro.
By default, the Night Mode is set as Auto:
Reolink Wireless Battery-powered Camera
Meaning
Wi-Fi Connection failed
35
Status
Blinking: Standby
On: Working
Blinking: Standby
On: Working