How is it powered?

Hello Robwith4characters, The Ring Smart Lighting Mailbox Sensor uses 3 AAA batteries. Average battery life is one year when used on the default settings. More information about the Smart Lighting Mailbox Sensor can be found here: https://support.ring.com/hc/en-us/articles/360050067431-Ring-Mailbox-Sensor-Information. Also, Ring Community was launched to help deliver the most current news and educational information to our neighbors. This online forum is divided into four categories: Product Boards, Ring Updates, Tips + Tricks, and a Moderators’ Corner. The Product Boards are where you can begin new topics with your questions or feedback; there is also a search option which helps you find topics that were already posted by other neighbors. We invite you to visit our site at https://community.ring.com/ today! Thank you, Antonio from Ring