Norco SS-300 3 Bay 3.5 SATA or SAS Hot Swap Rack Module 3 Bay 3.5" SATA(I, II or III) or SAS 6G Hot Swap Module; Support Plug & Play and Hot-Swappable Tray; Electromagnetic Interference shield design; RoHS compliance; Two 4-pin Redundant molex PSU connectors;