See your front door from anywhere at any time. Watch live videos from the EZVIZ App and the practical 4.3-inch color screen simultaneously and seamlessly. The screen's vibrant 1080p clarity makes it simple for kids and the elderly to understand what's going on outside. Once the doorbell button is activated by the visitor, the built-in chime rings out to remind people inside. You will get a prompt video call through the EZVIZ App in the interim. For apartment dwellers, the HP4's 155-degree lens provides a broad field of vision. It is also intelligent enough to switch between night and day modes on its own. Resolution: 1080p, Ultra-wide angle: 155° Look at Live View and Dual-Channel Video Call A Color Screen measuring 4.3 inches Seeing in the Dark As high as 3 meters (10 feet) Electronic doorbell integrated into the design H.265 4600mAh Rechargeable Lithium-Ion Battery