EZVIZ's video doorbells are wired and run on doorbell AC power, 12 to 24 V (16 to 24 V for the DB1 Pro).
The DB1 records 2048 x 1536, the DB1C 1536 x 1536 and the DB1 Pro 2544 x 1888. All three connect on 2.4 and 5 GHz Wi-Fi and are rated IP65. The plug-in Smart Chime works with the DB1 and DB1C.