V91 Professional Smart Digital Voice Recorder Portable Hidden HD Sound Audio Telephone Recording Dictaphone MP3 Recorder<br> <br>   Product Features: 1. Shell made from zinc alloy material, anti-fall strongly<br> 2. Professional recording pen chip of ATJ2127,HD recording<br> 3. Timestamp. Connect it to computer to check the recording time. (The recording file is named as REC001.WAV / REC002.WAV)<br> 4. Timer Recording and turn on automatically at your set time<br> 5. AGC function, adjusts the noise source automatically<br> 6. Monitor the recording in real time/Hearing aid fuction<br> 7. Voice Recorder,MP3 player,and USB flash drive<br> 8. Playback function: Support loop recording, A-B repeat<br> 9. Built-in high-fidelity speakers,direct external sound<br> 10. Starting up with password to protect the files<br> 11. Support checking the remaining recording time<br> 12. Support expansion memory with TF card, max support memory TF card is 32GB<br> 13. PCM recording.<br> 14. Eye free, LED backlight<br> 15. Support voice activated recording<br> 16. Detect low battery and save the recording files automatically<br> 17. Support monitoring recording<br> 18. Built in rechargeable 410mAh lithium battery<br> 19. USB 2.0 connector , easy to upload and download files<br> 20. Color: Black Specification: 1. Recording Format: WAV/MP3<br> 2. Music Playback Format: WMA/WAV/MP3/OGG etc. audio format<br> 3. Battery Recording Time: About 35 hours<br> 4. Battery Playing Time: About 21 hours<br> 5. Battery: 410mAh lithium battery Battery charging time: About 2 hours<br> 6. LCD Resolution: Dot Screen 96*64<br> 7. USB Interface: USB 2.0 High Speed<br> 8. Built-in Speaker: 18MM*26MM 8 Omega/1W<br> 9. Working Temperature: 0 to 40 degree<br> 10. Recording Sample Rate: 48KHZ<br> 11. Headphone Jack: 3.5mm, dual track<br> 12. Noise-signal ratio: 80db<br> 13. Size(mm): 85*26*11 (L*W*T)<br> 14. Net Weight: 45g<br> 15. Compatible System: Windows 2000&amp;above Package Included: 1*voice recorder<br> <br> 1*English manual<br> <br> 1*USB data cable