Califone 6-Person Spirit SD Six-Person Listening Center provides outstanding stereo sound in a portable system. Spirit SD multimedia player is perfect for group or individual reading activities, literacy, ELD, ESL and other language learning programs. Spirit SD multimedia player features built-in SD card slot, USB port and is made to work with the latest formats as well as cassette recorders, CD players or AM/FM radios. With four speakers the Spirit SD multimedia player is loud enough for up to 40 students. The headphone jack is intended for individual use or to connect a jack box for group learning. The listening center includes a carry/storage case, ten position stereo jack box with individual volume controls, six 3068AV stereo headphones, 6 ft coiled cord with 3.5 mm plug and noise-reducing ear cups.