Value-top VT-N300B slim casing has ATX-17 real 200 watt power supply unit, 1 x 8CM fan, 1 USB 3.0 port, 1 USB 2.0 port, refined brushed texture, tough HDD guide and ODD guide, full range dust-proof and shock-proof, multi-angle rotatable stands, absorptive sliding USB door, dual passages of heat-dissipation.