Description: Versatile and Retro Design: The standalone cassette to MP3 converter is a multifunctional cassette player with a vintage design. It allows you to easily convert old tapes into MP3 format without the need for a computer.Easy Using: Simply insert a USB flash drive (or USB card reader with STORAGE card), press the "Recording" button, and the device will automatically convert all music on the tape into MP3 format on your USB flash drive.AUX Port: audio output to the speaker, can also audio input for recording from other audio sources.OTG Port: for plugged in USB flash drive (or USB card reader with STORAGE card) to save recorded music.Portable: Cassette to MP3 converter is portable and convenient to use anywhere. Its compact size of 12cmx9cmx3.1cm/4.72inchx3.54inchx1.22inch makes it easy to carry around. Specification: Material: PPPower Options: USB cable (Including) or 2pcs AA batteries (Not Including)Note: We do not recommend turning off the power (unplugging the power) or unplugging the USB flash drive during recording, even though we designed the device to automatically save MP3 files for previous recordings when the USB flash drive is unplugged during shutdown or recording. Size Chart: 12cmx9cmx3.1cm/4.72inchx3.54inchx1.22inch Package Includes: 1 Cassette to MP3 Converter1 USB DC Power Cable1 Instruction Manual Note: Please allow slightly errors 1-2cm differences due to manual measurement.