Hamilton Buhl Classroom Cassette Player, 2 Station, 1 Watt (D132) (HA802) Plays MP3 files on USB Flash drives through built-in USB port 2 1/4" headphone jacks Auto shut-off and high quality speaker AC/DC operation Uses 4 C batteries (not included), or attached 5 120-volt AC cord (with cord storage compartment) Plays MP3 files on USB flash drives through built-in USB port 2  headphone jacks Auto shut-off and high quality speaker UL and CSA listed AC/DC operation 4- C cell batteries are not included