YoLink 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-YoLink Hub Required,YS7904-UC

STATE-OF-THE-ART Smart Water Leak Detection: LoRa-based 1/4 mile open-air range, 2+ year battery life, no dependence on WiFi, device-to-device pairing provides functionality even with the loss of AC and/or web!
ROPE STYLE water-sensing cable, 4.2 feet (1.2 meter) long, additional cables will also be added, for detection in confined spaces, such as under a dishwasher, and for defining specific detection areas, such as encircling a water heater
THAT WAS EASY! Installs quickly and easily, thanks to Scan & Play QR-code scanner feature in the app, easy wall-mounting, and no requirement to plug the sensor into an AC outlet.
NO WIFI, NO INTERNET, NO POWER? NO PROBLEM! Our patented Regulate-D2D device-to-device pairing, over our LoRa-based wireless network, allows for devices to be paired to one another, in this kind of way they’re going to continue to operate, although WiFi is flaky, the web goes down, or the AC power goes out!
A YoLink hub is REQUIRED! This device is not going to operate with out a Hub, not included. Please seek for B09FSS95G9 for a SpeakerHub (our audio, talking hub) or B07TQLKQLJ for the original Hub