This remote sensor pad attachment can be connected to the Water Alarm to increase its coverage area. In fact, you can daisy-chain multiple sensors to increase coverage area even more. The Remote Sensor is perfect for tight spaces and low profile areas i.e. under the refrigerator. For use with or without the included stands. You can easily attach it to the bottom of the Water Alarm by gently sliding the open end of each connector on the bottom of the Water Alarm.