One screw for easy opening and quick installation of cases Two slide inside door for easy access to chassis Fits in all types of Mainboard up to 244mm Dimension:505×194×450mm(L×W×H) Driver space:4×5.25"F.D.D. external,2×3.5"H.D.D. external 5×3.5"H.D.D. interna Cooling fan space:1×8cm extra upper fan,rest 4 fans'space(Option)for better ventilation Expansion slots:7full size USB port:USB,Microphone,Earphone,IEEE 1394(Option) Blue neon light on front panel Clips on bezel,no screws All edges debarred for safety Zinc plated treatment,S.E.C.C.steel sheeting FCC class CB&CE approved Combo member:SP-380,KB-2616,Optical Mouse M-2018