SMART WATER CONTROL: 10 year lithium battery, ruggedized housing, 1/4 mile long range, no reliance on WiFi and operation, even with the loss of WiFi, internet and AC power! YOU CAN DO THIS! SharkBite fittings make this a DIY job for anyone (with a moderate comfort level with some basic plumbing tools, and cutting copper pipe) NO WIFI, NO INTERNET, NO POWER? NO PROBLEM! Our patented Control-D2D device-to-device pairing, over our LoRa-based wireless network, allows for devices to be paired to each other, in such a way they will continue to operate, even if WiFi is flaky, the internet goes down, or the AC power goes out! A DECADE BETWEEN BATTERY CHANGES: The X3 line, made to be ready for commercial and industrial applications, is built to give you years of trouble-free service, including 10 or more years between battery changes! (Battery life is impacted by usage and environmental conditions, etc.) COMPLETE WATER LEAK PROTECTION SYSTEM: nothing pairs better with our valve controller than our top-selling line of water leak sensors. With two to five plus year battery life, the same long range and the same Control-D2D device pairing, this is a team that is hard to beat! SMART OR STANDALONE, you decide: use device-to-device pairing to control your valve with a fob and/or when a leak is detected (YoLink leak sensors required), but for full functionality, including for app control, Alexa and IFTTT, a YoLink Hub or SpeakerHub, with an internet connection, is required. Please search B09FSS95G9 for our audio hub, SpeakerHub, or B07TQLKQLJ for the Original Hub. Search B0978V4WQC for the FlexFob or B0BRCXZ66X for the On/OffFob.