3-in-1 design is equipped with a built-in camera, fingerprint unlocking function, and door sensor to help keep your home safe 2K resolution offers clear views so you can see exactly what’s going on around your door Wi-Fi connectivity pairs with your home network for seamless operation Dual motion detection, along with smart entering and leaving detection, alerts you to activity at the door Two-way audio lets you hear and speak to visitors remotely Included wireless chime with SD card, 120-day battery life, and no monthly fees make operation effortless