The WCH CH341B is a USB interface chip from Nanjing Qinheng Microelectronics (WCH) that supports USB-to-serial (UART) communication and includes integrated EEPROM for storing USB configuration descriptors. It is commonly used in embedded systems, USB-to-TTL adapters, and development hardware where flexible USB identification is required. The CH341B is compatible with Windows, Linux, and macOS using official WCH drivers, providing stable and reliable data transfer. Its low cost, compact design, and onboard memory make the CH341B a practical choice for serial communication, device configuration, and industrial control applications.