The Denon DR-210 is a vintage cassette tape deck manufactured by Denon, a Japanese audio equipment company. It was produced during the 1980s and is known for its high-quality playback and recording capabilities. The DR-210 features dual cassette decks, allowing for dubbing and recording from one tape to another. It also includes Dolby noise reduction technology to minimize tape hiss and improve audio quality. The tape deck has various playback modes, such as normal, high-speed, and pitch control. It has analog audio inputs and outputs, as well as a headphone jack for private listening. The Denon DR-210 is a popular choice among vintage audio enthusiasts and collectors.