The SOLO II emphasizes Quiet Computing and reinvents Antec's renowned Sonata line with a new set of attractive, practical features. Externally, the SOLO II's dual-layer 1.0 mm SECC / polycarbonate top & side panels absorb noise for exceptional sound dampening. To reduce vibration-related noise, the dual hard drive mounting system gives you the option of mounting your hard drives using tray mounts with silicone grommets or the tool-less suspension mount system. SOLO II features an anodized aluminum front bezel and piano black exterior for an elegant, professional appearance. With washable fan filters and two front panel USB 3.0 ports, the SOLO II is the rebirth of Quiet Computing.