Used item. This is a listing for the main unit only. Product Name: Thunderbolt 3 to Thunderbolt 2 Adapter Model: A1790 Please refrain from purchasing if you do not understand that this is a used item or if you are sensitive to the condition. Due to the risk of issues such as part swapping, we will not accept returns or exchanges. Please understand that we will prioritize the person who purchases the item, even during price negotiations. Thank you for viewing. Thank you for your consideration.