What is the difference between the two lenses?

One lens gives a wide 4K view of the whole scene. The other is a telephoto lens for a closer look at detail, so you get both without moving the camera.

Does it need a PoE switch?

Yes. It is powered over Ethernet, so you need a PoE switch or injector and a cable run to the camera. There is no battery or Wi-Fi option.

Can it pan and tilt on its own?

Yes. The camera pans and tilts, so one unit can cover a wide area. You can also move it to look at a specific spot.

Is it for indoor or outdoor use?

It is built as an outdoor security camera for yards, driveways and storefronts. It is wired, so plan the cable route before mounting.

How does it compare with a single-lens Tapo camera?

The C575D adds a second telephoto lens and pan and tilt, so it covers more ground and shows more detail than a fixed single-lens model. The trade-off is a larger body and PoE wiring.