<P>Give your AdvanceStack hubs reliable power from a name you can trust. HPs J2962A is a Redundant Power Supply for 10BT and VG Hubs that supports up to 4 AdvanceStack devices including Hub-24 and Hub-48 models. It includes four DC cables, two AC cables and rack mounts for quick and easy installation. The HP AdvanceStack Redundant Power Supply can be installed in the HP AdvanceStack Switch 800T, -208T, -224T, or HP AdvanceStack Switching Hubs -24R, -24T, and -12R to provide uninterrupted power. This unit can provide backup power for up to four AdvanceStack devices. </P>