We've had a couple of times over the years tripped the GF outlet in the garage because the builders saved a nickel and wired the back deck outlet to the same GF circuit. If someone left the deck outlet cover open and it rained we'd trip the garage GF outlet and the freezer would shut off. The freezer had a high temp alarm beeper, but that only worked if there was power. Bought this thermometer, put the remote inside the (metal enclosed) fridge and put the display in the kitchen which is one floor above the garage. No problem with a signal getting through. Seems to update about once every 30 seconds.