S07 HD Noise Reduction Voice Recorder Portable MP3 Player 1. Core Functions：Supports regular recording, voice-activated recording (auto-startsstops by sensing ambient sound), audiomusic playback; stores up to 999 recording files, which need regular cleanup. 2. Operation Methods：Power switch controls startupshutdown + recording activation; connect the wired remote to switch to playback mode, supporting playpause, track skipping, volume adjustment and file deletion. 3. Settings & Connection：Configure parameters (time, voice activation sensitivity, recording quality, etc.) via TXT file on computer; connect to PCOTG-enabled phone via USB for file transfer and memory formatting. 4. Battery Life & Charging：Built-in 90mAh lithium battery, offering ~20 hours of recording (at sampling rate ≤512Kbps); green light flashes during charging and stays on when fully charged. 5. Hardware Details：Equipped with USB port (chargingdata transferwired remote connection), lanyard hole, tri-color indicator (shows battery levelworking status) 6. Additional Accessories：Package includes earphones, USB-C charging cable, wired remote (supports playback control), etc. Specifications 1. Number of recorded files: 999 audio files 2. Recording bit rate: 32K-192Kbps (The default is 192Kbps) 3. Recording format: MP3 format 4. External input: 3.5pin Stereo Jack 5. Source of recording: Non directional microphone, VOR Recording 6. Environment: 0 - 40 degree Celsius 7. Power supply mode: Lithium batteries (90MA) : 3.3V-4.2V 8. Headphone output: (L) 9mW + (R) 9mW (320Ω) 9. Recording Distortion: < 10% (maximum volume) 10. Storage method: Embedded Flash 11. Battery time: The recording (512K) lasts about 20 hours 12. USB port: USB 2.0 high speed data transfer 13. Size: 23.5 x 25.5 x 8.5mm 14. Weight: about 18.7g (bare machine)