This item was purchased new some time ago, but I stored it after using it for about a year when I received a new one. I am selling it because I will not be using it anymore!! There are no noticeable large scratches or stains, but there may be some scratches and stains from use. (Please check the condition in the images before purchasing) This is a used item and has been stored at home, so there may be other minor scratches and stains that I have not noticed. We are looking forward to your purchase if you understand this! Please refrain from purchasing if you are nervous about the condition. All accessories are included in the images. Instant purchase without comment is OK! (Please read the description to the end.) If you have any questions, please comment. Equipped with two hard drives, it simultaneously supports time-shift machine recording and normal recording on one unit. Recording time目安 Model number: THD-500D2 Capacity (for time-shift machine / for normal recording) 4TB + 1TB Time-shift machine recording time: Approximately 80 hours Normal recording Terrestrial digital: Approximately 125 hours BS/110-degree CS: Approximately 88 hours 4K broadcasting: Approximately 64 hours When recording up to 6 channels of terrestrial digital broadcasting at HD rate (maximum 17Mbps) Recording time when recording only each broadcast When recording terrestrial digital broadcasting at HD rate (maximum 17Mbps) When recording BS/110-degree CS digital broadcasting at HD rate (maximum 24Mbps) When recording new 4K satellite broadcasting (maximum 33Mbps) Hard disk capacity is 1TB = 1000GB Calculated based on 1GB = 1 billion bytes. Width x Height x Depth (main unit only) 165 x 64 x 240mm Weight (main unit only) 1.9kg Power supply AC100V 50/60Hz Power consumption 12W ☆Compatible models for rear installation Z740X series / X930 series / Z730X series / RZ630X series / X920 series / Z720X series / X910 series / Z810X series / Z700X series