The Original Apple MacBook Pro A1502 Retina 2013 2014 USB HDMI I/O Board B1 is a replacement part specifically designed for Apple MacBook Pro laptops. This black I/O board is compatible with the A1502 model and provides essential connectivity options such as USB and HDMI ports. With a voltage of 3V, this unit is a reliable and high-quality component for maintaining or upgrading your Apple MacBook Pro.