Features: No Computer Needed: This cassette to MP3 converter doesn't require a computer. Simply insert a USB flash drive or a USB card reader with an SD card, and you can easily convert your old tapes to MP3. Portable Design: This cassette player is compact and lightweight, allowing you to carry it with you and enjoy music anytime, anywhere. High-Quality Mechanism: This cassette to MP3 converter features a high-quality mechanism that supports old tapes, ensuring clear sound quality and long service life. Multifunctional: In addition to the conversion function, this device also supports MP3 audio format playback, and has recording and playback functions, with simple operation. Auto Reverse Playback: This cassette player features auto reverse playback, allowing for loop playback. You don't need to manually flip the tape, enjoy an uninterrupted music experience. Note: Batteries not Included Specification: Color: Black Material: ABS Converter format: MP3 Power supply: 2*AA Battery, any USB port power supply (5V DC adapter, USB from computer, etc) Format of USB flash: Support FAT,FAT32,exFAT Working time: 2 hours with 2*AA battery Audio channel: Stereo L/R Bit Rate: 128Kbps Dimensions: 11.3*8.2*3.2cm Weight: 186g (without batteries) Package size: 15*11*4.5cm Package weight: 238g Package list: 1* Cassette to MP3 Converter 1* Charging cable 1* Earphone 1* User Manual