This is a genuine AC charger for the LENOVO ThinkPad USB-C Dock DK1633 40A9. It has a output wattage of 90W and a voltage of 20V, making it a powerful and efficient choice for charging your device. The unit type is a unit and the color is black. This AC/DC adapter is compatible with the LENOVO ThinkPad USB-C Dock and is designed to provide a reliable and steady charge. It has output amps of 4.5A, making it a capable choice for charging your device. This item is perfect for those who need a replacement charger or want to have a spare.