Explore the new USB device class API introduced in Zephyr RTOS version 3.3.0 through this informative conference talk. Gain insights into the experimental USB support and the newly added device stack. Learn about the common API for interfacing with class implementations, including USB-IF class specifications and third-party specifications. Discover how to implement a simple function supporting multiple instances and understand the management functions for adding or removing class instances at runtime. Delve into the relevant differences and features of the new USB device support, with a focus on its mandatory API for all new implementations. This presentation by Johann Fischer from Nordic Semiconductor ASA provides a comprehensive overview of the USB device class API, its functionality, and its impact on existing and future USB class implementations in Zephyr RTOS.