2 track recording and erase head and 4 track play. Voice operated recording (VOR). Built-in speaker for group listening or use headphone (included) for private listening. Functions: one touch recording, play, FF/CUE, rewind/review, stop track selector and variable speed wheel. Use built-in microphone or attach optional mic to record. Tapes recorded on this unit can be listened to at increased or reduced speed. Uses 2 "AA" batteries (not included). Unit measures 3 1/4"Lx4 7/8"Hx1 1/4"D.