With this kind of ezcap231 cassette tape to MP3 converter, you can easily convert your old tape to MP3 without a computer. Can partition each songs of tape automatically, long press the "Next" button 3~5 seconds,to change the mode. Auto Mode: each song a MP3 File, Light:Blue,Manual Mode: Green Light and a tape a MP3 File. With auto reverse function. Use AUX port, you can also record the music from other sources with an 3.5mm audio cable(such as:radio,MD player,any other device that with audio line out). you just need to plug a USB flash drive to the USB host of the Cassette Player.then press "record" button, the device will convert the tape to your USB flash drive in MP3 format automatically. You can also playback on it to check the converted music files by pressing the playback button of the cassette player. You can also put the other MP3 files into the folder of the USB Flash drive( the folder is created when you record from the tape), then listen to them Just Connect the USB Flash drive to other player which has the USB port to play the recorded music. such as: computer, portable speaker,etc. Notice: Just support FAT,FAT32, exFAT format. if you want to edit your recorded MP3 files, you can use a free software-Audacity, download it from:http:audacity.sourceforge.net or contact with us. . Converter format: MP3 Power supply: 2*AA Battery, or by 5V DC adapter,USB Power supply from PC(AA batteries are not included) Working time: 1 hour with 2*AA batteries Audio channel: Stereo L/R. Bit Rate: 128Kbps. Package Contents: 1*ezcap231 Cassette Tape to MP3 Converter. 1*USB to 3.5mm cable for power supply use 1*User manual.