It allows you to easily convert old tapes into MP3 format without the need for a computer. 【AUX Port】: audio output to the speaker, can also audio input for recording from other audio sources. 【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.
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