Features RoHS compliant design 2 x front-accessible USB ports 1 x 8cm hot replaceable fan Supports 1 x 3.5” internal HDD or 1 x 3.5” removable drive(optional) Supports Pentium 4 half-size CPU card Specifications Construction Heavy duty metal SBC Form Factor Half-size, slot CPU card Drive Bays 1 x 3.5" HDD Cooling Fans 1 x 8cm I/O Ports 2 x USB I/O openings 1 x COM, 1 x LPT Expansion Slots 5 slots Indicators Power, HDD Buttons power switch, reset Operating Temperature 0-50°C Operation Humidity 10% ~ 90% Color W: White Weight (Net/ Gross) 3.8kg / 5.6kg Dimension (DxWxH) 269mm x 140mm x 230.5mm Recommended Backplanes Model No. SBC Interface PCI ISA PSU Connector PSU Connector x1 x4 x16 BP-4S-RS-R30 ISA 0 4 0 0 0 AT IP-4S-RS-R30 PCISA 3 0 0 0 0 AT IP-4S2-RS-R30 PCISA 2 1 0 0 0 AT IP-4SA-RS-R30 PCISA 3 0 0 0 0 ATX IP-4S2A-RS-R30 PCISA 3 0 0 0 0 ATX HPE-4S1 PCI/PICOe 3 0 0 0 0 ATX HPE-4S2 PCI/PICOe 2 0 0 1 0 ATX Power Supply Options Type Model No. Watt AT ACE-916AP-RS 150W ATX ACE-816AP-RS 150W ACE-4518AP-RS 180W