1.Bluetooth function: you can transmit the music to other bluetooth receivers.(Please Note:Press the PLAY button. The device will auto search and pair the Bluetooth receiver) 2.Cassette player: play your collected tapes, this retro-style music player allows you to return to the old days and relive your good memories past. 3.Power: powered by 2 AA batteries (not included) or used by DC power(Not included) 4.More function: it has also auto reverse function to turn the tape over quickly with 'DIR' button, once or infinite reverse with 'playmode'button in left or right. 5.Box contents: 1 x Cassette Player, 1 x USB cable, 1 x Earphone, 1 x User Manual