4U-eT4PC48 Chassis Material:High-grade steel Appearance:gray black or white Dimension:482mm(D)*430mm(W)*177mm(H) Cooling fan:2*80mm PCI extended slot:7pcs Filter:Removable and upturned Control panal:Power and reset system Direction lamp:6pcs hard disk lamp Mainboard size:12"*9.6" Loudspeaker:input(0.4W) Drive frame:1*5.25"+1*3.5",1*3.5HDD Temperature:0℃(32°F)～50℃(122°F) Relative humidity:5%～95%