This product is an ABS control unit from WABCO, model ABS-D. It is compatible with 6S/6M systems and operates at a voltage of 24V. The product code is 446 003 416 0, and according to the label, it was manufactured in Poland.
The unit has a robust metal casing, with approximate dimensions indicated by the ruler in the image. The connectors are located at the bottom of the unit. At the bottom of the casing, there is a red label from a distributor, indicating additional information about warranty and service.