Works fairly easily, installation requires no instructions, connecting to the app is easy. I don't have any lab equipment to verify accuracy, so they don't care. I'm taking off 1 star for the temperature control and ease of use as it beeps continuously until you press the button. when you turn off the power. In my personal case, this happens quite often and it's annoying. I also bought this because it works with the Smartlife app which works with Alexa. Note, however, that you can't set or get the temperature through Alexa. I use it as a secondary temperature controller to act as a watchdog for my main temperature controller. . I use it to control a heater in a 3D printer case, my main controller was glued and every metal surface in my case was around 90 degrees Celsius; So now I'm running two so that if it overheats, the power shuts off.
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