Outdoor Siren Power Modes

Hello All Despite reading a lot of posts I am afraid I am still a bit confused about the way outdoor siren is powered. I understand powering the siren and powering dusk to dawn feature are two separate issues but what I want to understand clearly is if I were to use the Ring Plug In Adapter then will it power both the siren AND the dusk to dawn feature and there is no need for any other power? What I want is avoid the need for climbing up the ladder periodically to change anything. So, can someone please clear this up for me? So, to summarise, if I use the plug in adapter will that be all or do I need the additional battery pack as well to power both the siren and the dusk to dawn feature? Many thanks…