The answer depends on the model of your camera.
Applies to: Reolink PoE cameras
DC Power adapter is not included in the box of PoE cameras, except for the RLC-423, RLC-423S, and RLC-823 Series cameras. There is a DC 12V 2A power adapter provided in the box for these cameras.
For Reolink RLC-423, RLC-423S, and RLC-823 Series, the ratings of the power adapter should be DC 12V 2A.
For other Reolink PoE camera models, the ratings of the power adapter should be DC 12V 2/1A.
The Reolink Elite Pro Floodlight PoE camera does not support power supply via a DC adapter.