I am selling items I no longer use as part of organizing my belongings. This item is from cleaning out my child's room, as they have moved out for work. I may not be able to answer questions as I am not knowledgeable about the item, but thank you for your consideration. (❁ᴗ͈ˬᴗ͈)" Thank you very much for viewing. (^-^) ● Product Information TEXAS INSTRUMENTS TI-15 Function Calculator Skeleton, Retro Feel ● Condition There is a stain like a sticker mark on the surface of the case. (❁ᴗ͈ˬᴗ͈)" There is some wear and tear as a used item. Please check the condition in the photos. ⬇ ⬇ ⬇ ⬇ ⬇ ◤◢◤◢ Request ◤◢◤◢ If there are any operational defects or problems after the item arrives, we will provide a refund, so please contact us before giving a rating. (We cannot respond to junk items, as they are assumed to be broken.) We cannot respond after the rating, so thank you for your understanding. ◤◢◤◢ Request ◤◢◤◢ 【Please Note】 Everything in the photos is included in this listing. Please understand that if the manual, box, or other accessories (parts) are not shown in the photos, they are not included. (❁ᴗ͈ˬᴗ͈)" Thank you for your understanding. (*ˊᵕˋ*)