The BPEXT481 Extension Cable allows you to connect your Tripp Lite SMART5000XFMRXL UPS system and BP48V24-2U battery pack in a front-mount four-post rack configuration in order to extend runtime. It also adds 1-ft. (0.31 m) to the connection between other compatible Tripp Lite 48V UPS systems and external battery packs. The BPEXT481 is constructed using 6 AWG two-conductor black cabling. It features two Blue 175A DC connectors: one output for the battery pack and one input for the UPS system. Connects SMART5000XFMRXL UPS and BP48V24-2U Battery Pack in Front-Mount Rack Application Compatible with other Tripp Lite 48V UPS systems and battery packs Heavy-duty 6 AWG 2-conductor black cabling 2 Blue 175A DC connectors (1 output, 1 input) 1-ft. (0.31 m) in length