Used Synology NAS DiskStation DS216play. I am selling this as I am replacing my equipment, though I purchased it for use as a home NAS. All 10 screws for attaching HDDs are attached to the installed HDDs. The AC adapter is missing, so I am substituting it with a 12V4A adapter. I had no power capacity issues when using two 3TB HDDs, so I'm including it as a bonus for operation confirmation. (If you are concerned, I recommend purchasing a 12V5A replacement.) I am including two Western Digital RED 3TB (WD30EFRX) HDDs that I have been using in combination with it. The operating time was 9385 hours. I initialized the system before listing and completely deleted the data, including the deleted areas. Please understand that these are used HDDs. Used in a smoke-free and pet-free environment. I will not respond to price negotiations. Immediate purchase is OK. Thank you for your consideration. I will wrap the main unit in bubble wrap, waterproof it, and ship it in a reused cardboard box. - Brand: Synology - Model: NAS - Color: Black - Extras: 2 HDDs, power adapter Thank you for viewing.