Missing cords but box and install disk and book inside The Matrox TripleHead2Go Digital Edition External Multi-Display Adapter T2G-D3D-IF is a power supply unit designed specifically for Lenovo laptops. It allows users to easily connect multiple external monitors or projectors to their system, providing a seamless multi-display experience. With this adapter, users can expand their workspace and increase productivity by working on multiple tasks across multiple screens simultaneously. It is a reliable and efficient solution for those looking to enhance their computing experience with additional display options.