Voice Activated Mode Starts recording automatically when sound is detected and pauses when the sound stops. Note: it cannot power on by voice; you still need to press REC to turn on. One Key Noise Reduction Push up the Noise C key to reduce environmental noise. Rechargeable Battery and Recording Time 500 mAh rechargeable battery; continuous recording more than 45 hours in MP3 format. Recording formats and bitrates: PCM WAV: 1536 Kbps / 1024 Kbps / 768 Kbps / 512 Kbps MP3: 192 Kbps / 128 Kbps / 64 Kbps / 32 Kbps TimeSetting and File Naming Timebased file naming helps identify which day a recording was made. Support If you have any questions, we will provide a satisfactory answer. Applications Interviews and field reporting: hands voiceactivated recording captures conversations clearly. Meetings and lectures: noise reduction improves clarity; timestamped files simplify organization. notes and memos: longduration MP3 recordings for easy reference.