The ATXMICRO220B is proof that good things come in small packages. The compact design allows for vertical or horizontal positioning to suit your space requirements. This micro case is big on performance: four drive bays, four low-profile expansion slots, front USB and IEEE-1394a ports, tool-less entry, a 220-Watt power supply, and room for a Micro-ATX motherboard. Now you can build a quality system within the tightest space Use with portable peripherals like PDAs, Digital Cameras, DV Camcorders and other external storage devices Slim case design is the ideal solution for home or home office environments where space is Front mounted USB 2.0 & IEEE1394 ports for easy access Spacious interior accommodates a Micro-ATX motherboard Slim Case is designed with one 5.25 external drive bay, two 3.5 external drive bays, one 3.5 internal drive bay and 4 expansion slots Allows use of either 4 Low Profile PCI cards, or a PCI or AGP Riser Card with 3 Low Profile PCI cards Tool-less top cover removal for easy access to internal components Quick, screw-less internal CD-ROM and drive