eSATA介面可傳輸SATA III速度高達6Gbps，並可透過一個eSATA介面讓您使用四顆硬碟( 需eSATA port multiplier )。可與大部分有eSATA port multiplier的RAID控制卡相容，提供您可於外部安裝硬體RAID的選擇，非常適合有限空間的系統。這個極小外接盒容量可搭配市面上最大容量硬碟(6TB)，最高可到達24TB，對於大部分的應用都可以發揮最大空間效益。
”完美”還不足以定義MB561U3-4S，由高質感鋁合金材質精心打造並搭配兩種不同的顏色 (黑/白)，ICYCube的外殼材質以磨沙霧面處理，類似蘋果Macbook系列產品。前方精緻光滑面板展現與外殼截然不同的對比設計。ICY DOCK的logo標示在外殼兩邊，以可靠及堅固聞名的ICY DOCK 製造。白色LED指示燈會顯示每一個硬碟開關狀況，方便您分辨哪顆硬碟正在使用或是閒置。MB561U3-4S使用適度照明LED來當作指示燈，讓您了解運作狀況。MB561U3-4S也採用了內建電源來讓所以主要的零組件都保持在裝置內，所以產品外也沒有沉重的電源變壓器佔據桌子空間，故可保持您的工作空間乾淨整潔。
"I was impressed with the build quality of these two drive enclosures. They are reasonably durable and should have no issue safely containing drives. Their solid anodized aluminum shells are not bad to look at, either. The ICYRaid has simple hardware RAID features easily selected by a rear panel switch, making configuration a no brainer. The ICYCube only operates as a JBOD unit, meaning those desiring RAID are going to have to rely on software-RAID features of their OS (as well as the corresponding performance hit when using a software RAID through a single external interface link)."
"The ICY DOCK ICYCube is a quad bay USB 3.0 enclosure with fully loaded functions and eye-catching design. It is perfect for media professionals, and people who need a high quality HDD enclosure for their storage needs."
" Icy Dock ICYCube is a well-built hard drive enclosure. If you are looking for one that can handle up to four 6TB drives, then you would not be sorry choosing the ICYCube. Installation is incredible easy and the cooling fan on auto mode remained quiet even in a hot room, yet it kept my drives cool. The Icy Dock ICYCube earns the HiTechLegion.com Gold award for its build quality "