1、STEREO OUTPUT: Cassette player plays sound music tapes perfectly through 3.5mm headphones or 3.5mm AUX jack in the car, stereo output, no hum or other noise, buttons work well. 2、AUTO REVERSE FUNCTION: Cassette recorder player has an auto reverse function that allows you to quickly flip the tape using the "DIR" button and reverse it once or indefinitely using the left or right "Play Mode" buttons. 3、PLUG AND PLAY: Portable pocket tape player is plug and play, no need to have a computer to convert sound cassette tapes to MP3 format and playback USB flash drive sound. 4、USB FORMATTING: Format USB to FAT32, because USB 64GB can only be formatted to exFAT and NTFS, exFAT is not very compatible, so there will be problems when burning. Sometimes even FAT32 original files need to be reformatted. 5、AC DC POWER SUPPLY: Cassette tape player uses 2 x AA batteries (not included) or USB power (included), if you use USB power it is recommended to remove any batteries first.