The Liebert GXT4-48VBATT is a 48VDC Rack/Tower External Battery Cabinet designed for use with the Liebert GXT3-500RT, GXT3-700RT, GXT3-1000RT, GXT3-1500RT, GXT3-2000RT, GXT4-500RT, GXT4-700RT, GXT4-1000RT, GXT4-1500RT, and GXT4-2000RT, 120V and 230V UPS systems. Includes rack mount fixed rail kit and 1.5 foot interconnect cable and has a standard two-year warranty, with optional warranty extensions of one year or three years