Enermax Coenus Cases MidTower ECA3291A-B Dual USB 3.0 ports with internal 19-pin and one USB2.0 converter. Over sized acrylic window with clear view to show off internal rigs. Flexible HDD configuration allows customized system build: 7 x 3.5" with upper HDD bracket in 3.5" position. 4 x 2.5" + 3 x 3.5" with upper HDD bracket in 2.5" position. 3 x 3.5" with upper HDD bracket being removed for maximized VGA card cooling. Easy installation: Enermax patented SlideIn ODD design. Rails with Rubber Pads for easy 3.5"/2.5" device installation. 30mm clearance behind M/B tray for easy cable routing. Cut-out for quick CPU cooler maintenance. Supreme cooling performance with 6 x fan support: Dual 12cm fan slots in front for maximized airflow. Support ENERMAX UCTA18A/UCTVQ18A x 1 on top. Removable dust filters at bottom for easy cleaning. Comes with 1 LED Blue Front fan intake (Can hold 2 x 12cm fans for HDD cooling). Also comes with a rear fan exhaust.