Cassette converter to mp3: Autoflip and fidelity stereo. It can be used as a walkman to listen to cassettes with headphones, a speaker, or a car stereo. Just plug the 3.55mm AUX jack into the converter to enjoy the sound memory. Auto Rewind: Automatically records both sides of a cassette to a USB drive, powered by a USB port or 2 AA batteries (not included). Supports 44.1kHz and 48kHz sound rates, and 16bit MP3 production. Multi Format: Collect and convert old tapes into MP3 format via U flash. Supports FAT and FAT32 formats, up to 64G. For FAT32 mode, it is suggested to use U flash at 32GB. Read and write speed is 46M/S. Portable Design: Functions as a cassette player. Lightweight and portable design lets you play and transfer anywhere at any time. Each package includes headphones for easier listening and conversion. Use scenarios: Digitize a family cassette collection to preserve memories as MP3s on a USB drive or computer. Create MP3 backups for car stereo playback during travel or daily commuting. Transfer school or office dictation tapes to MP3 on U flash for digital storage and easy sharing.