This item was kept in storage as inventory. Although it is unused, it is being listed as "minor signs of use, scratches, and dirt, but not noticeable" because the instruction manual is not included and its operation has not been confirmed. Please purchase only if you understand this. If you have any questions, please be sure to ask in the comments before purchasing. We cannot accept inquiries after a purchase. Thank you. UD-4504UH ・EX・HD-SDI TDM function (3M IP 4Ch) 4KUHD 4Ch ・Equipped with a 2.0Tb SEAGATE surveillance HDD ・H.264 High Profile ・30fps@1080p8K-HDMI/VGA simultaneous output ・CMS CD Please ask any questions you may have before purchasing. Thank you.