What prerequisites do I need to use Arlo Audio Doorbell?

To use an Arlo Audio Doorbell, you need the following:

• An Arlo Pro 2, Arlo Pro, or Arlo wire-free camera and base station.
• An AC-powered mechanical or digital chime operating between 8-24 volts (if you decide to use your existing chime).
  Note: An Arlo Chime or traditional chime aren’t required to use an Arlo Audio Doorbell.