Belkin WeMo Motion Sensor, Pair With Your WeMo Switch or Light Switch for Home Automation Controlled by Motion, Wi-Fi Enabled (Discontinued by Manufacturer) Get smartphone notifications when motion is detected at home. Know when kids arrive home. Know when Grandpa wakes up. Know when your cat visits the litter tray so you know to clean up (not useful, but funny) Customize when, and how often you receive notifications Motion control your home electronics when paired with WeMo Switch (Sold separately) Get notifications anywhere over 3G/4G/Wi-Fi Works with WeMo Switch