The Thermaltake Soprano VB1000SWS ATX/MicroATX Mid-Tower Case boasts high-efficiency ventilation with dual 12cm silent fans in front and rear, 9cm fan on side panel. It features a patented sliding rail design for easy 5.25" devices installation, dual USB 2.0, IEEE 1394 FireWire, audio and speaker ports, retractable foot stand, front panel 3-way key lock, enclosed dust cloth, security chassis intrusion detector alerts when the side panel is unexpectedly opened, EMI protection spring, screwless slots for easy assembling, thumb-screws for easy open side panel, and a washable dust filter for easy cleaning and replacement. The highly flexible "Silent Purepower supply" unit supports PS/II for PC case (optional).