STATE-OF-THE-ART WATER CONTROL: LoRA-based up to 1/4 mile open air wireless range, device-to-device pairing for offline without internet & AC power, remote app control, remote fob control (fobs sold separately), voice assistant control DEVICE INTEGRITY MONITORING: 24/7 cloud server device supervision monitors the valve controller for online presence, signal strength and battery level, to ensure it will work when you need it AUTOMATIC SHUT-OFF: no internet- & no power-required automatic shut-off when you pair your YoLink water leak sensors to your valve controller, a key part of the YoLink Smart Water Leak Protection System YOU CAN DO THIS! It's a DIY job can be done by almost anyone with a moderate comfort level with some basic plumbing tools, and cutting copper pipe (fittings sold separately) 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. BATTERIES INCLUDED: four AA batteries, good for 2+ years standby, are included!