Enermax 2.5-Inch External Hard Disk Drive (EMK3104) Patented NSS (Non-scratch SATA) connector Standard 3.5" HDD size fits into any PC case or server Additional USB 3.0 port for external use Both SATA & SAS HDD compatible SATA 6.0G (SATA III) hard drives compatible 50,000 times HDD plug-in and ejection durability guaranteed Easy drive plug-in and ejection mechanism Aluminum cover and ventilation holes on the bottom side provides great ventilation SATA & SAS HDD Compatible 50,000 times HDD plug and eject guaranteed SATA 6.0G (SATA III) hard drives compatible Easy drive plug-in and ejection mechanism Security key locks Additional USB 3.0 port for external use 50,000 times HDD plug and eject guaranteed Aluminum cover and ventilation holes on the bottom side provides great ventilation