The file 'Powerful PM-4400 Micro DC Modem UPS Wall Mount Holder 3D Printer Model' is (stl) file type, size is 9.7KB.
This is a wall mount holder for a Powerful PM-4400 Micro DC Modem UPS device.
The holder is not fixating the device. You can take it off and put it on because it is holding the device thanks to gravity :)