You will need an electrician for the installation unless you are knowledgeable. So, factor in that cost as well. It was installed for checking the water heater. The instructions, although in English, are more confusing than helpful. Initially, it only works with 2.4GHz wifi, so be careful with that. Then you need to install the Smart Life app on your phone. Be careful, the pairing is done initially with this; I thought I was pressing the button and pairing with the router (WPS). Instead, you need to bring the phone close to discover it via Bluetooth and then enter the wifi password you are connected to at that moment with your phone. This way, the security will be updated with that password, and it will connect to the wifi. After that, things are simpler; it appears in the app as a device (you change its Chinese name) and you can turn it on and off from there or set a timer for it to blink on its own with a schedule, with sunrise or sunset (it will require access to your location at the time of setting), or to turn on at one time and off at another, etc. The timer (meaning to turn off in X minutes from the time you turn it on and not at a specific time) is for some unknown reason in the settings, instead of the timer button, but at least it works and shows live the remaining time before it turns off. So I achieved what I wanted, not to forget the water heater on and to turn it on from afar. I got it on sale for €28. -1 star for the confusing instructions and because it doesn't work with 5GHz wifi. Also, if you want more than one device (phone) to activate it, you need to share the specific controlled device with another person who has the app or add the other user as a second account; you cannot simply add the device to the app with the second phone, it will cancel the first one