Logitech X Pro - Advanced Features and Storage; Receiver Storage in Mouse; Aperture Door Replacement

The USB receiver can be stored inside the mouse by removing the POWERPLAY aperture door. This can
prevent the receiver from being lost when using the mouse with the Logitech G POWERPLAY wireless
charging system.
Removing this door also allows the included, optional aperture door with PTFE foot to be installed
instead of the default aperture door.