RFT Stern-Radio R4100 radio cassette recorder

The RFT R4100 is a classic portable radio cassette recorder, commonly referred to as a boombox, produced during the late 1970s and 1980s. It was manufactured by VEB Stern-Radio Berlin, which was part of the state-run RFT (Rundfunk- und Fernmelde-Technik) conglomerate in the German Democratic Republic (East Germany).

This specific model was a staple of East German consumer electronics, known for its robust build and functional design. Following the reunification of Germany, the state-owned enterprises like RFT were largely dismantled or sold off by the Treuhandanstalt. Today, the RFT brand remains a significant piece of industrial history, and these devices are often sought after by collectors of vintage audio equipment and those interested in 'Ostalgie' (nostalgia for aspects of East German life).