The Reolink smart doorbells help you to better see what's happening at your front door. You receive notifications when someone rings the doorbell or walks by. You can view the footage live or rewatch it later. They mainly differ in the way you connect them, the image quality, and storage. You can choose between WiFi, a fixed network cable, or Power over Ethernet. Models such as the Reolink Video Doorbell PoE can record during the day and at night. The Reolink Video Doorbell (battery) only stores footage when it detects movement.