WiFi & Bluetooth connection, which means it will automatically switch between Bluetooth and WiFi connected smart plugs, depending on the range.
#2 How do I Connect My Dual band Router to 2.4Ghz Plugs?
Method A: Please turn off 5GHz networking before first connecting. Method B: Set 2 different SSIDs for the 2.4GHz and 5GHz networks, then connect these plugs to the 2.4GHz WiFi network only.