The product is a lot of 12 vintage 3COM US Robotics Ethernet 10BaseT XJack XJEM3336 PCMCIA PC Cards. These PC cards, with the brand USRobotics, are designed for vintage computing systems. They offer Ethernet connectivity through the XJack port and are perfect for those looking to enhance their vintage computer's networking capabilities. These cards are a great addition to any collection of vintage computing parts and accessories.