Please examine the product carefully and bid if you are satisfied. Operation has been confirmed, and it is working properly. The power cable is not included. Please make sure you are satisfied with the product before bidding. We are not professional photographers, so please review all photos carefully before considering a purchase. We cannot answer inquiries regarding the purchase date or usage period of the product. Also, we do not have technical knowledge about the product, so we cannot answer technical questions. Please make your judgment based on the product images. We are selling on the assumption that you have viewed all the images. Please feel free to bid. Our products are very satisfactory and useful.