That is a VDB750 Video Doorbell Camera and can be paired to your account via the Video tab in the Alarm.com website or mobile app.
More information on pairing this camera can be found here: Alarm.com Video Doorbell ADC-VDB750 - #3 by tyler
However, after submitting this ticket, I am showing that a VDB750 was added to the account successfully. Did you still have questions about pairing this camera?