Water Leak Sensor 2,1/4 Mile World's Longest Range Smart Home Water Leak Sensor,Water Leak Detector with Built-in Siren Up to 105dB,Works with Alexa and IFTTT- Hub Required,YS7904-UC

Advanced Smart Water Leak Sensor: Features LoRa-based 1/4 mile open-air range, over 2 years of battery operation, and no reliance on WiFi. Device-to-device pairing enables operation even during AC power and/or internet loss. ROPE STYLE water-sensing cable, 4.2 feet ( 1.2 meters) in length. Extra cables can be connected for monitoring in tight areas, like under a dishwasher, and for outlining specific monitoring zones, such as around a water heater. SIMPLE INSTALLATION! Sets up swiftly and effortlessly, utilizing the Scan & Play QR-code scanner feature in the app, simple wall-mounting, and no need to plug the sensor into an AC outlet. NO WIFI, NO INTERNET, NO POWER? NOT AN ISSUE! Patented Control-D2D device-to-device pairing, via a LoRa-based wireless network, permits devices to be linked so they will keep functioning even if WiFi is unstable, the internet is lost, or the AC power fails. A hub is NECESSARY! This device will not function without a Hub, which is sold separately. Search for B09FSS95G9 for a SpeakerHub (an audio, talking hub) or B07TQLKQLJ for the original Hub