The Lenovo ThinkPad Thunderbolt 3 Dock Gen 1 is a high-quality docking station designed for the ThinkPad series laptops. With Thunderbolt 3 ports, this black unit offers fast and efficient connectivity options. As a new old stock item with the model number 40AC0135US, this docking station is a reliable and versatile accessory for enhancing your laptop's functionality. Perfect for those looking to expand their laptop's capabilities with a trusted brand like Lenovo.