Sound dampening material sound dampening material for optimal noise reduction (front, both side panels and top) Removable sound dampening cover The top cover panel can be removed to increased ventilation when need Reversible, steel front door A reversible mounting system allows the door to open from either side of the case Silence fans silence FP 120mm PWM (8001400 RPM) fans for a whisper-quiet performance and rubber Padding to reduce noise vibration Sd Card reader/ Headset jack The I/O panel features an SD card reader and Single 4 pole Headset jack for simultaneous audio and microphone capabilities Materials are Steel, Plastic, Tempered Glass and Sound Dampening Material