Q90 Intelligent HD Digital Noise Reduction Recording Pen, Capacity:8GB 1. One key to turn on, one key to turn off, press lightly to start recording 2. After the voice-activated recording mode is turned on, it will automatically record only when there is sound, and it will automatically pause when there is no sound, which saves storage space. 3. DSP digital noise reduction technology 4. Automatically save when power off to prevent data loss 5. Support power-on setting password to protect audio data 6. Built-in high-sensitivity microphone, high-definition recording within 60 meters distance 7. Only support Android phone OTG connection, you can play and manage files on the phone 8. Sampling rate: 48KHz 9. Number of bits: 192Kbps 10. Battery: Built-in 120mAh lithium battery 11. Recording format: WAV 12. Recording time: 48 hours of continuous recording 13. Standby time: 68 hours 14. USB: DC to USB 15. Material: zinc alloy polished 16. Product size: 13.7 x 1.3cm 17. Product weight: about 34g