I bought this set of 4 Sengled Bluetooth Smart Plugs to add to my existing Sengled Smart Hub which already has Alexa integrated via WiFi. Since I own several dozen WiFi lamps and Sengled WiFi plugs, I found the smaller form factor to be more useful. However, when they arrived and I was unable to add them to the Sengled Hub nor to my Wi-Fi Alexa on my Facebook portal, I discovered that this product does not support connections to the Sengled Hub and since it connects via Bluetooth, this is not supported by my Alexa on my portal over Wi-Fi. This was a huge disappointment, very frustrating, and a huge waste of several hours of my time, and buyers are mindful of the limitation that it can only be used with Bluetooth-enabled Alexa like the Echo Dot. In my case, a falsely advertised product with very poor documentation and support, not recommended at all. I return mine.