Thank you for viewing. This is a used, working Lenovo genuine ThinkPad 170W square AC adapter ADP-170CB B. Functionality confirmed. Included: Power cable Power: 170W Output: 20V⎓8.5A Shape: Square (slim tip) Model number: ADP-170CB B Although it is a used item, there is little dirt and it is in relatively clean condition overall, but it is a used item, so please check the images and consider purchasing only if you understand. No comments, instant purchase OK. Thank you very much.