The Fostex D-20 DAT Recorder is a professional digital recorder designed for musical instruments and DJ equipment. With 2 microphone inputs, 2 phono inputs, and 2 line inputs, this portable device allows for versatile recording options. Its input/output ports include XLR in, TS 1/4 out, and XLR out, providing high-quality connections for a range of audio equipment. The compact design and reliable brand reputation make the Fostex D-20 a popular choice for recording music and sound in a variety of professional settings. But powers on and settings change on the pressing of buttons.