The Ring Bridge unlocks smart controls for Ring lights. It lets Ring lights, doorbells and cameras talk to each other and work better together in the Ring App, so you can receive mobile notifications whenever motion is detected and adjust settings with your phone or tablet. With the Ring Bridge you can also group together Ring Smart Lights and connect them to Ring doorbells and cameras. If one Ring Bridge-enabled device detects motion, it can turn on lights, activate cameras and more. It also lets you connect Ring Smart Lights to Alexa-enabled devices to turn on lights and adjust settings at the sound of your voice. *One Ring Bridge supported per household. Supports approximately 50 Ring Smart Lighting devices, including Motion Sensors (dependent on usage and other factors).