The mydlink Wi-Fi Water Sensor alerts you when water is detected. The built in siren is perfect for alerting you to a leak when you're home. And if you are not at home, the mydlink Wi-Fi Water Sensor will send push notifications to your iOS or Android device, letting you know of a leak problem before it becomes a disaster. You can place the sensor cord almost anywhere around water heaters, washing machines, sinks or in locations where you fear there could be a water leak, giving you total peace of mind while at home or away. Setup is simple. Just plug it in, download the app, and with a few taps, you'll be good to go.