A device including a multilayer stack of: a first substrate having a glass function; a first electronically conductive layer with an associated current lead; an electroactive system; a second electronically conductive layer with an associated current lead; and a second substrate having a glass function. Each of the electronically conductive layers has a resistance per unit area enabling it to have an equipotential surface in coloring mode and bleaching mode, and each having a variable resistance that gradually decreases from the periphery toward the interior of the electrically controllable device by choosing the resistance at the center of the glazing, in the zone or zones furthest away from the current leads, so that the ohmic drop over the central surface of the substrates of the glazing, in the zone or zones furthest away from the current leads, is at most equal to 5% of the voltage applied across the terminals of the device.