Parameter: 1. Bluetooth: 5.0 supports two-way transmission 2. Music format: MP3 (MP1, MP2, MP3)WAVAPEWMAFLAC, etc., lossless loud sound (M4A is not supported) 3. Video format: AMVAVI (random video conversion tool computer conversion video) 4. Picture format: JPGJPEGBMP photo 5. E-book mode: TXT files only 6. Play mode: RandomRepeat 7. Operation mode: button type 8. Display type: HD screen 9. Headphone jack: 3.5mm 10. Charging input: 5V 1A 11. Screen resolution: 128x160 12. Menu language: Chinese, English and other languages 13. Function: watch function, support bluetooth, picture browsing, FM radio function, recording function, external speaker function, video output, digital photo frame 14. Battery capacity: 3.7v 200mah 15. Charging time: about 2 hours 16. Long time music playback: 5-8 hours 17. Lyrics display function: LRC lyrics display 18. 7 preset equalizers: rock, funk, hip-hop, classical, electronic, jazz, custom 19. Display: 1.8-inch TFT color screen 20. Interface: USB 3.0 21. Material: ABS 22. Size: 55.5x42.5x12.5mm 23. Net weight: 29g Features: 1. Built-in voice recorder, FM radio 2. 3.5mm audio jack 3. Small screen, easy to carry, Bluetooth wireless connection 4. High-fidelity sound quality, make the sound more comfortable, and enjoy wonderful music with you 5. Lightweight, easy to carry, exercise and fitness, easy to put in your pocket, no burden 6. Multi-format video playback, small portable theater, support AMVAVI video format playback 7. Large-screen high-definition movies, judging from the built-in powerful hardware acceleration, the video is smooth and not stuck, and the visual experience is more shocking