The deck was bought from Japan and was revised carefully. Maybe it still needs furter fine tunning but it sounds great as it is now as well. It is the Japansese 100V version and a power adapter is provided. The Nakamichi 680ZX are the world's finest cassette decks to record at both half speed and standard speed. Three hours of music - a full opera, four or more LP's - on a single C90! Half speed performance that rivals that of many decks at full speed - 15Khz bandwidth sufficient for any FM broadcasts and most records. Switch to standard speed and the bandwidth extends to 22Khz for the most demanding live recording. Specifications Type: 3-head, single compact cassette deck Track System: 4-track, 2-channel stereo Tape Speed: 4.75, 2.37 cm/s Heads: 1 x record, 1 x playback, 1 x erase Tape Type: type I, CrO2, Metal Noise Reduction: B Frequency Response: 20Hz to 22kHz (Metal tape)