Weidmueller ALDT 2.5 4C BL

The "ALDT 2.5 4C BL" refers to a type of electrical cable. "ALDT" likely stands for the product series or manufacturer, "2.5" represents the wire gauge (2.5mm²), "4C" indicates the cable has four conductors or cores, and "BL" typically stands for "Blue," referring to the color of the insulation or jacket.