This is an enclose for an IKEA Tradfri switch. IKEA launched a series of IoT products, the switch can be hacked and connected to eg a Wemos Mini programmed to issue MQTT commands.

Search youtube for

IKEA Tradfri IOT Smart Lighting System Hack
by Andreas Spiess (video 140)

for more details.

Removing the switch from its original enclosure can be destructive, so a new enclosure is needed. I modified a small bowl (shaving), and added a slot and groove to allow a usb lead to be inserted into the base.

The fit on my printer is a snug interference fit, and no glue was needed to hold the switch in place, and there's a series of small internal indentations (from original shaving lid use) where the original switch clips can just fit in.

Anet A8

No

No

0.1mm

10%

I printed this at high resolution for a better finish, but it's not really critical.

A good fit on my printer, but tolerances may vary between machines, and you may need to sand, glue, or enlarge/shrink the print as required.