Product Details Ⅰ. 16GB internal memory supports up to 320 hours recording or 3000 songs, with expandable TF card slot (supports up to 128GB, card not included) Ⅱ. Voice activated recording (VOR function) automatically starts when sound is detected, saving storage space by eliminating silent segments Ⅲ. 3072kbps high bit rate recording with dual noise reduction microphones, captures clear audio; built-in Hi-Fi stereo speaker for playback without headphones Ⅳ. 880mAh battery provides 150 hours continuous recording and 100 hours playback with headphones; direct flash memory data reading enables fast file transfer Ⅴ. One-click recording/backup with date-time named files for easy management; supports MP3/WAV formats; 4-digit password lock protects private files Specification Ⅰ. Storage: 16GB internal memory, expandable via TF card (up to 128GB, not included) Ⅱ. Battery capacity: 880mAh Ⅲ. Recording time: Up to 150 hours continuous Ⅳ. Playback time: Up to 100 hours with headphones Ⅴ. Recording bit rate: 3072kbps Ⅵ. Recording format: MP3/WAV Ⅶ. Connectivity: USB 2.0 Type A (for Windows and Mac; Mac requires USB-C to USB-A cable, included cable is USB 2.0 Type A) Ⅷ. Additional functions: AB repeat, variable speed playback, time-based recording, segment recording, speaker playback, low battery protection Package List Ⅰ. Digital voice recorder × 1 Ⅱ. USB cable × 1 Warm Tips Ⅰ. When connecting to Mac, use a USB-C to USB-A cable (included cable is USB 2.0 Type A) Ⅱ. TF card is not included; maximum supported capacity is 128GB Ⅲ. Set a 4-digit password to protect private files from unauthorized access Ⅳ. Voice activated function (VOR) needs to be activated manually before use