1.Conformed with EMC design standard to prevent from electromagnetic interference . 2.Support motherboard size up to 12"*9.6",and 7*3.5"HDD bays,2*5.25"CD-ROM ,standard PS2 power supply. 3.The chassis has good ventilation system with 2x8025 and 2x6025 fans to make sure the system work steadily. 4.Color:Sand grain black(Optional)