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Airthereal Water Leak Detectors 2-Pack$19.99
This set includes 3 sensors with 1 gateway hub to connect up to 24 sensors at once for real-time notifications in the event of water leaks or dripping. The adjustable 0-120dB alarm allows alerts to be heard throughout the house while the WiFi gateway allows you to receive instant notifications on your phone in the event of a water leak.