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
