NOTICE!!! Manufacturer has started using unsupported non-ESP8266 chips recently and this device might not be compatible anymore. Check seller descriptions or contact them before buying!
You will also have to add the following commands in the console to make this work properly.
Backlog SerialLog 0; PowerOnState 0; SetOption63 1; LEDState 1 Rule1 ON System#Boot DO Power3 On ENDON # Turn the USB port on Rule1 1
The model purchased from Amazon 2020-03 has this GPIO Mapping
GPIO0: Green Center LED inverted GPIO3: Top Button GPIO4: Amber Top LED inverted GPIO5: Bottom Button GPIO12: Bottom Outlet Relay GPIO13: Top Outlet Relay GPIO14: Amber Bottom LED inverted GPIO15: USB Relay