M9 AI Intelligent High-definition Noise Reduction Voice Control Recorder Ebook Bluetooth MP3 Player, Capacity:16GB(Black) 1. Can be used as a sound source to connect to Bluetooth headsets and speakers 2. E-book portable e-book, multiple functions, just to give you a better reading experience 3. It is also a radio, stable and reliable, not easy to disconnect, listen to popular broadcasts anytime, anywhere 4. 360-degree wheel design, easy operation 5. Equipped with AB repeat +-8-level variable speed playback, a good partner for practicing oral English 6. Small size, easy to carry 7. Fully charged in 20 minutes, can be put continuously for 38 hours, charged for 5 minutes, can be played continuously for 6 hours 8. Support OTG mobile phone interconnection 9. Display: 1.2-inch OLED color display, resolution: 800*480 10. Music format: MP3.WMA.WAV, APE, FLAC 11. Bluetooth version: 4.2 12. EQ sound effects: normal, rock, funk, hiphop, jazz, classical, electronic music, custom 13. Lyric format: LRC 14. E-book: TXT, LRC 15. FM radio: 87.5MHz-108MHz76MHz-90MHz 16. Recording format: MAV, MP3 17. Frequency range: 20Hz-20KHz 18. Signal to noise ratio: greater than or equal to 90dB 19. Battery capacity: 170mah 20. Menu language: Simplified Chinese, Traditional Chinese, English, Korean, Japanese and other languages 21. Size: 3.8x3.7x1cm