IDE/SCSI -- Wisdom Series Mobile Rack Map-M310/M311/M313/M313-E Features: Special Mechanism is offering both functions of easy removing drive devices & Force -Saving. Magic Fan warning system: Red LED On (Fan Stop or Impeded). Front-Side Fan for easy replacement. SCSI-ID LED Indicator. Solid Aluminum structure for Excellent Heat-Dissipation. Safety Keylock switch for power on/off control. Meet EMI shielding requirement. IDE/SCSI/SCSI-II/Wide SCSI/Ultra(2) Wide SCSI/Ultra 160/SCA-2 available. Optional: Backside Fan. Width 3.5" Model No. Map-M310 Map-M313 Map-M313-E Interface IDE(ATA-66/100/133) SCSI-3 Ultra160 ID Switch None Yes Yes Display None Yes Yes Dimension(WxDxH) 146x245x42.5 mm Material Base Case/Inner Case: Aluminum Upper & Bottom Cover: Tin-plated Front Bezel: Plastic ABS UL 94HB Fan Alarm 40x40x10 mm Fan - Front Side / Rear Side (Optional) Cooling Fan 40x40x10mm Hot Swappable Fan +12V DC Power Requirement DC +5V, +12V Packing List 20 pcs / 1 CTN N.W. (kg) 21.0 G.W. (kg) 21.8 Measurement 1.38 CuFt