TASCAM Portastudio 414 Mk1 4 Track Analog Cassette Recorder. No power supply! The original PS does not work anymore. You will need a 12v DC 500ma CENTER NEGATIVE power supply. Make sure it is is Center Negative! I powered this on and it played back the last tape i recorded a few years ago. All the functions seem to be working but it is sold AS IS since I can't test everything and I don't really know all the features anyway.