Structure Size(mm):275*170*355 Case Size(mm):305*170*355 Packing Size(mm):330*200*385 Material:0.35mm SGCC(Inside structure)+ABS Plastic Motherboard: ：ITX/M-ATX Drive bay: DVD rom 5.25" x1 HDD 3.5" x2 SSD 2.5" x3 PCI:4 Fan support：front:120mm*1 side:120mm*1 rear:80mm*1 Max CPU upper height:155MM Max GPU length:265MM I/O: Embedded front panel, No need screws Switch on/off*1 Reset *1 USB Port:4 (2 USB1.1+ 2 Standby) Audio input*1 & output*1 Type C Charge port*1 Card reader port *1 2500 pcs/ 40HQ