The Microsoft Surface Book 3 1899 Charging Connector Port Flex Cable is a specific replacement part designed for the Microsoft Surface Book 3 1899 model. Made by Microsoft, this AC & DC connector port flex cable is compatible with various models of the Surface Book series, including the Surface Book 2 1832, 1835, and 1793. This part is essential for charging and powering your laptop, ensuring a reliable connection for optimal performance.