Zalman t4 v2 mini tower pc case key features bottom psu installation high efficiency vga card installation space safe edge molding hddssd installation bracket anti vibration and sound absorption rubber expandable pci slot specifications case type mini tower colour black front usb 20 ports 1 front usb 30 ports 1 front headphone jacks 1 front microphone jacks 1 expansion slots 4 motherboard support mini itx micro atx drive bays external 525