Rugged rackmount chassis is designed to withstand the toughest and compact environment. is 4U height with only 15'' in depth and special features of front USB access, ball-bearing cooling fan, and system sensor board to enhance functionality and usability for critical missions and applications.Compact 15'' Depth.1.6mm Steel Body Chassis.Shock Absorbing Drive Cage.Front Access USB2.0 x2.120mm x1 Cooling Fan.Removable Air Filter.Fan and Temperature Monitor Option.Industrial Keylock Bezel.RoHS Compliance Version: Yes.Standard Drive Bays: 3.5'' Drives: 1.3.5'' Drive (internal): 2.5.25'' Drives: 2.Indicators: LEDs for Power ON/OFF, HDD, Fan and Alarm.Switches Power ON/OFF, System and Alarm Reset.Expansion Slots: 7.Material of Front Bezel: 1.6mm SECC Zinc-Coated Steel.Material of Handle: 1.6mm SECC Zinc-Coated Steel.Material of Main Chassis: 1.6mm SECC Zinc-Coated Steel.Color of Front Bezel: Black.Color of Main Chassis: Black.Front Connector: Front USB 2.0 x 2 Connector.Air Filter: Removable and Washable.Motherboard Size: 12 x 9.6 (ATX, microATX).Cooling Fan: 1x120mm.Dimensions: 19.00'' W x 6.97'' H x 15.00'' D - 482.6 mm W x 177.0 mm H x 381.0 mm D.