Full sizes for all types of mainboards 2 optional fans and vent for video card Driver space: 5 x 3.5" H.D.D space and 4 x 5.25" H.D.D space for further upgrade USB and jackport in front panel No-sharp edges for safety concern SECC material meets for CE and FCC standard Multimedia keyboard: 14 multimedia keys for shortcut using Egonomic design PS/2 and USB compatiable Quality plastic material injected by precise mold Multilingual version available for different countries Optical mouse: 3D optical ergonomic design mouse with 800dpi resolution Multimedia speaker: stylish and slim design with good quality sound