Fangrui Product Details 1. Q9 Ai Intelligent High-definition Noise Reduction Conference Recording Pen Voice Control Recorder, Capacity:4gb 2. You Can Record While Writing, Easy To Use 3. Intelligent Noise Reduction Chip, Long-distance Unvoiced Technology, High Restoration Of Lossless Original Sound 4. Built-in Time Chip, Record File Generation Time And End Time, Accurate To The Second, Easy To Organize, And Improve Credibility 5. One-key Recording, One-key Saving, Simple Operation 6. Can Be Clipped In Pockets, Bags, Books, Not Easy To Lose, Easy To Carry 7. After The Voice Control Recording Mode Is Turned On, It Will Automatically Record Only When There Is Sound, And Automatically Pause When There Is No Sound. 8. Support Power-on Setting Password, Intimate Protection Of Audio Data 9. You Can Directly Delete Unnecessary Recording Files On This Machine, Which Is Convenient For Sorting Out Documents 10. Support Of Refills 11. When The Battery Is Low, The Recording Will Save The File In Advance, And Then Turn It Off For 1 Hour To Fully Charge It, And Continue To Record For 38 Hours 12. Battery Capacity: 120mah 13. Length: 142mm