Safety: This item is up to nationally recognized standards for high-level electronic safety. Fit for Lenovo ThinkPad USB USA Ultra Pro Dock Gen 1 2, 40A90090US 40AS0090US 40A20090US 40A10090US Docking Station Power Supply Adapter Cord. [Do not buy if your laptop requires more than 4.5A]. After-sales services: This product is eligible for replacement or returns within 30 days, and the manufacturer provides an additional 12 Months Guarantee. Package Includes:1 X Power Adapter, 1 X Power cord. Output:20V 4.5A 90W Input:100-240V