TZ-201B Specifications: 1) Drive Bays: a) 5.25" x 4 (EXT) b) 3.5" X 1 (EXT) c) 3.5" X 6 (INT) 2) Mainboard: ATX 3) Expansion slots: 7 4) Optional front USB and multimedia port 5) Options: 1 x 80mm fan 6) Material: 0.5mm SECC 7) N.W: 4.5kg 8) G.W: 5.5kg