I have several YoLink products and they all work very well. I also have several water leak sensors - in bathrooms, under sinks, water heaters, air conditioners, refrigerators and washing machines. They have a very good range and are extremely easy to set up. I tested every sensor out of the box and they all worked. I've done a firmware update on each of them, which is also very easy. I haven't added a water shut-off valve yet, but plan to do so in the future. Very glad we can have more peace of mind that we can find out a water leak and make a quick decision which can save a lot of money and headaches. By the way, they also have very good customer support. I contacted them and my questions were answered quickly. Battery life also seems very good, although it's too early for me to tell.
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