D-Link DPS-700/E redundant power supply, 589W 589W external redundant power supply, up to 589W output power for PoE switches, universal external AC power supply for input voltages of 90-264VAC and 47-63Hz, permanent monitoring of the built-in power supply and regulation of the switch power supply, 1+1 power mode to increase the total PoE capacity, Short-circuit and overvoltage protection, standard rack-mounting metal housing with 1U suitable for PoE models of the DGS-3120, DGS-3130, DGS-3420, DGS-3620, DGS-3630, DWS-3160 series and the DGS-1510-52XMP, DGS-1520-28MP and DGS-1520-52MP models, 1m DC connection cable included.