Smart video doorbells do a lot more than ring. This complete guide breaks down exactly how they work — from the camera sensor and motion detection technology to Wi-Fi protocols, cloud storage, and smart home integration. We compare the top models from Ring, Google Nest, and Arlo side by side with real manufacturer specs, explain the difference between wired and battery-powered devices, and cover what homeowners, renters, and security-conscious buyers need to know before choosing a model. Plus: why your home's Wi-Fi network may matter more than the doorbell itself.

A smart lock is an electromechanical deadbolt you control from your phone, a PIN keypad, fingerprint, or voice — no physical key required. This guide breaks down exactly how smart locks work, compares top models by real manufacturer specs (Schlage, Yale, August, Kwikset), and helps homeowners, renters, and property managers choose the right protocol — Bluetooth, Wi-Fi, Z-Wave, or the new Matter standard — for their situation.