# System Constants

This page aggregates system-related constants used by functions and methods from the C and C++ APIs.

GET_MANUFACTURER_STR

  Request the USB manufacturer string descriptor.

GET_PRODUCT_STR

  Request the USB product string descriptor.

GET_USB_SN_STR

  Request the USB serial-number string descriptor.

GET_FW_VERSION

  Request the firmware version string.

GET_HW_VERSION

  Request the hardware version string.