1. Lid switcher: Slide down to open the lid, so can put cassette in.
2. AUX port: Audio output to speaker, also can be audio input to record from other audio source
3. OTG: For plug USB disk (or USB card reader with SD card), to save recorded music.
4. Operate buttons: Volume control, Play, Stop, Fast forward, Rewind, ect.
5. Power supply: 2 x AA batteries or USB cable DC-in (batteries not included)
6. Format of USB flash: Support FAT, FAT32, exFAT
7. Audio channel: Stereo L/R
8. Bit Rate: 128Kbps
10. Dimensions: 11.3x8.2x3.2cm
11. Weight: 186g