1. Small and flexible, easy to carry 2. Strong operability, one-time recording, one-key saving 3. Integral high-sensitivity capacitor Dual microphone head, stereo surround recording 4. Independent acoustic noise reduction chip to achieve clear and noise-free recording 5. When playing recordings or learning materials, you can set multi-level variable speed and AB repeat recording 6. Support time recording, voice to text 7. Support power password setting to protect data security 8. Even in the absence of a computer, it can be directly connected to an Android phone via OTG 9. Battery capacity: 300mAh 10. Recording time: 30 hours 11. Playing time: 12 hours 12. Charging time: 2.5 hours 13. Recording format: wav/mp3 14. Playback format: wav/mp3/wma/macace/fla/ogg/aac/aax/m4a 15. Dimensions: 11x27x85mm