Add Mobile Rack Peripherals Sonnet"s Echo Express III-R Mobile Rack Kit allows you to install two 5.25-inch mobile rack devices inside the III-R"s enclosure, such as an internal LTO 6 tape drive plus an enclosure for four swappable 2.5-inch SSDs. An alternate configuration might include a Sonnet Qio MR pro universal media reader. Or, install one full height mobile rack devices, such as an enclosure for three swappable 3.5-inch hard disk drives - now you can add more devices to your rack without taking up additional rack space. The Echo Express III-R Mobile Rack Kit includes an internal 250W power supply inside to power the installed devices, an internal fan to cool the installed devices, and mounting hardware to secure the devices and the kit itself. Motion Media, LLC carries the entire line of Sonnet Technologies hardware for all your computer upgrading needs. EXP3FR-MRM Features Easy Installation Add two 5.25" mobile rack peripherals to your Echo Express III-R expansion chassis without adding rack space Easy Installation Installs easily into Echo Express III-R mobile rack kit bay Internal Power Supply 250W power supply powers installed cards Internal Fan Cools installed devices within a rackmount environment Diverse Support Supports devices such as LTO tape drives, swappable drive enclosures, optical drives, Qio MR pro universal media reader, and more! PCIe cards are sold separately. Requires Thunderbolt cable sold separately.