Add to your Smart Water Security System with customizable Smart Water Detectors. Simply place the discreet 3.5” Detectors in an attic, basement, laundry room, or anywhere that is potentially vulnerable to water damage by environmental factors or fixture malfunctions. When water, excess humidity or extreme temperatures are detected, the device sends an alert via the Flo by Moen app, sounds an audible alarm, and emits a blinking LED light. Use your Detectors as standalone monitoring devices or connect them to the Flo by Moen Smart Water Shutoff (sold separately) for whole-home protection with automatic water shut-off. If you also have the Flo by Moen Smart Water Shutoff installed, moisture sensed by the Detector can trigger the shut-off feature of your internal home plumbing to protect the home from extended water damage.