This model own a very nice looking. It can be place vertically. With large current power switch. Make it durable for use. SD3516 have a USB2.0 & eSATA combo version call SD3516SATA - Compatible with USB 2.0 and USB 1.1 standards - Windows 98/2000/ME/XP, Mac compatible - High speed data transfer up to 480 Mbps - Suitable for all types of 3.5 "IDE hard disk or 3.5" SATA HDD (for SD3516SATA) - High quality external power adapter with dual voltage 5V/12V input - Large current power switch - The HDD mount on a plastic frame - Aluminum magnesium alloy material Specification: Name: 3.5" Hard Disk Enclosure Model: SD3516, SD3516SATA Size: 202mm(L)X107mm(W)X31mm(H) Colour: White, silver, black, blue, red etc. Transfer rate: Up to 480Mbps 3Gbps for eSATA 400Mbps for IEEE1394a Interface: USB B-type receptacle ESATA receptacle(option)