Kingwin Multi-Bay Internal Rack, 4 Drives for 3 Bay Space for SATA Components Other KF-4002-BK 3.5" Internal hot swap rack raid-4 bay Key lock system for added security Supports SATA III (6.0 Gb/s) Easy transport and secure valuable data Supports hot swap LED indicator One 120 x 120 mm rear fan Patent NSS (Non-Scratch SATA connector)