The Sony WM-EX77 is a vintage auto-reverse portable cassette player (Walkman) originally released in 1991. It belongs to the "Talent & Color" or "Nick Talent" series, notable for its unique color schemes and compact logic-controlled chassis Key Technical Specifications • Tape Type Compatibility: Type I (Normal), Type II (CrO2), and Type IV (Metal) playback via a manual tape selector. • Frequency Response: 20 to 18,000 Hz. • Power Output: 2 x 5 mW. • Dimensions (W x H x D): 108.2 mm x 75.7 mm x 24.5 mm (some sources list depth up to 25.4 mm). • Weight: 175 grams Core Features • Audio Enhancements: Equipped with Dolby B NR noise reduction and Extended DBB (Dynamic Bass Boost) for lower frequency performance. • Mechanism: Belt-driven single motor with full-logic controls and anti-rolling mechanism. • Functionality: Features an Automatic Music Sensor (AMS) to skip songs forward and backward, an AVLS (Auto Volume Limiter System), and a physical Hold lock switch to prevent accidental button presses. • In-Line Remote: Includes a remote control attached to the headphone cord for playback managemen