4U, 500W High Efficiency Power Supply, 5x 3.5" Internal HDD Bays, 3x 5.25" Peripheral Drive Bays, 1x Slim DVD-ROM Drive Bay, 7x Full-height, Full-length Tool-less Expansion Slots, Dual channel Air Duct design, 2x Front USB 2.0 Ports & 1x Com port, Front System Fan, Power Switch, Reset Switch & 6x LED Indicators