ADD-ON SENSOR - Requires SW-A11KT (Water Sensor Kit) to function. Not compatible with DCH-S1621KT (older version). NEW FOR 2025 - The SW-A2 Water Sensor Pod is a newer version and will not work with the previous models of D-Link Water Sensor products SMART WATER DAMAGE PREVENTION FOR YOUR HOME – When paired with your SW-A11KT (Sold Separately), the Remote Water Sensing Pod (SW-A2) can monitor for water leaks in your home and send you alerts when a leak is detected FLEXIBLE PLACEMENT – With its low profile compact size (6.4cm x 6.4cm x 2.1cm) and equipped with water-sensing probes along its bottom, it is perfect for placing in any area of your home such as by your Washing Machine, Sink, Water Heater, Bathtub, Dishwasher, Refrigerator, or Aquarium for complete water leak peace-of-mind WHOLE HOME MONITORING - SW-A2 Pods can be controlled by a single Master Sensor Plug to expand water leak monitoring as your property needs grow. Uses an integrated long-range sub-GHz wireless connection to connect to the Master Plug-in Smart Wi-Fi Water Leak Sensor found in the SW-A11KT kit (up to 1000 ft). Battery life of up to 2 years with the 2x pre-installed AAA batteries KNOW WHEN A LEAK IS DETECTED - Receive Push notifications to your iOS or Android device, trigger the 100 dB alarm and strobe light on your SW-A11KT kit and receive voice notifications from your Google Home speakers when a leak is detected