This is the FOSTEX Multitracker X-15. Now you can record both indoors and outdoors. It runs on batteries, so you can use it anywhere. You can create a 4-channel mix on cassette tape. Overdubbing allowed you to layer different sound sources (instruments/microphones) by yourself. By adjusting the pitch control and varying the speed, you could do multi-track recording, allowing you to check and re-record any mistakes in your instrument playing. For amateur artists, Enjoy the charm of analog sound sources! A classic item from the Showa era. Comes with the original box. The box has noticeable stains.