The Grundig RB 840 is a radio cassette player manufactured by Grundig, a German consumer electronics company. It was likely produced in the 1980s or 1990s. It features a built-in AM/FM radio tuner and a cassette deck for playing audio tapes. Unfortunately, there is no further information available about its specific features or specifications.

The Grundig RB 840 is a radio cassette player manufactured by Grundig, a German consumer electronics company. It was likely produced in the 1980s or 1990s. It features a built-in AM/FM radio tuner and a cassette deck for playing audio tapes. Unfortunately, there is no further information available about its specific features or specifications.