Apartment or house owners, the EZVIZ HP4 smart peephole transforms your front door into a discreet surveillance station. Its 4.3-inch color screen and 2 MP camera provide a clear image, while the 155° wide-angle lens captures the entire hallway or landing. Automatic day/night switching ensures continuous visibility, and two-way audio allows you to communicate with visitors without opening the door. The integrated doorbell triggers an immediate alert, and the battery lasts up to five months on a single charge—a rare convenience for daily life. Compatible with doors 35 to 105 mm thick, the HP4 installs without complex wiring and operates between -10 and 45°C.