This enclosure for the sonoff basic is with a big button on top. This button presses the small button of the sonoff basic, which is hard to find in the dark.
There are two holes in the button, the small one should be aligned with the sonoff button, the big one should be filled with some springy foam, to raise the button evenly when not pressed.
The button is easy to press, and can be pressed at any place.
There is also strain relieve for the electrical wires.