Hornettek HD-3210-U2S-1X X2JBOO 3.5" Dual Bay Hard Drive Enclosure, SATA to USB 2.0: * Universal fitting for dual 3.5" SATAI/II HDD * Back panel power on/off switch * Plug and Play, hot-swappable * Onboard jumper switch for JBOD and BIG modes * 50mm internal fan * FCC/CE compliant