Dual C 839 RC cassette deck. Fully functional, with new rubber belts. All functions of the cassette deck have been checked, all buttons and lamps work. Very well preserved with a few minor scratches.A great collector's item The Dual C 839 RC is a stereo cassette deck manufactured in West Germany in 1979, known for its advanced features for the time, such as fully automatic reverse and Sendust heads. Features and Specifications This model stood out in its class for several innovative features: Auto Reverse: Fully automatic reverse, allowing continuous playback or recording on both sides of the tape. Sendust Heads: Using Sendust heads (one for recording/playback, two for erasing) which were superior to the Permalloy heads of the time. Logic Controls: The controls are based on computer logic and solenoids. Noise Reduction: Dolby-B noise reduction is incorporated. Frequency Response: Rated to reach 30Hz to 20kHz when using metal tapes. Wow and Flutter: A low value of ±0.03% W.R.M.S.. Variable Tone Control: Allows tape speed variation of up to ±4%. Fast Rewind: Rewinds a C 60 cassette in approximately 65 seconds.