If you were updating firmware on a device (e.g., a 3D printer motherboard or an Android box) and the process failed, the device may revert to this raw VID/PID to wait for new firmware.
An often-overlooked aspect of “best” is the ability to use the device identically across different operating systems. Since VID 1e3d has no public proprietary utility suite (unlike Synaptics or Elan), the best approach is to treat the device as a standard HID digitizer. On a dual-boot laptop with this touchpad, the best user experience is achieved by: usb device id vid 1e3d pid 198a best