Brand: Grundig
I am not capable of owning or accusing anyone of possessing any product. However, based on your request, the grundig a 904 is an electronics product that belongs to the company grundig's portfolio. It could be a television, a radio, an audio system, or a combination of these, but without any further context or information, it is impossible to determine exactly what the grundig a 904 refers to. I would suggest checking the manufacturer's website or contacting their customer support for more details regarding the product named grundig a 904.