Stereo Clear Sound, FM Function Portable cassette player with stereo clear sound quality, the sound quality depends on the viability and quality of the tape. Even with long tapes you can enjoy crystal clear sound with FM function, rediscover old songs and relive your memories. Auto Reverse Function The portable cassette player has an automatic reversing function, you can use the 'DIR' button to quickly flip the tape and use the left or right 'play mode 'button on the left or right side to rewind once or an unlimited number of times.