ring pro from 2021 first gen unit including chime unit. this ring doorbell works fine, the chime works well and over all condition is very good. used in a porch area so not exposed to full sun and rain. only removed to change to a unit which stores the data locally. ring door bells do work without a subscription but you can't access all the features and the recordings unless you do. this unit needs a power supply as it doesn't have an internal battery. the kit does supply bits if you have an old school powered bell, I never used that myself. I used a sperate power supply unit which is not included.