Display controller

Hello, All! I recently reviewed the ZX-Review for 1991, issue 2 and came across there is an advertisement for an interesting device: "Professional Display Controller" - 24 lines of 80 characters; - the ability to select the sign matrix using a switch generator 8x8 or 8x14; - full software compatibility with the BASIC interpreter, assemblers GENS, ZEUS and any other programs working through the RST 10 procedure; - the ability to use 4 POKE operators to set an arbitrary window; - easy connection, just insert into the system connector without changing either the machine's circuitry or ROM. address 270026 Odessa-26, post office box MP "KIT" Does anyone know anything about this development? Maybe someone even saw her. In general, any information on it is sought. Best regards, Dmitry Zaytsev.