1. Built-in dual microphone dual channel stereo recording, professional noise reduction. 2. 0.96 inch LED matrix display, 128x64 resolution. 3. All-metal shell, oxidation process, overweight feel. 4. One -click recording & preservation, simple operation. 5. Power on password locks, file review functions to facilitate finding editors. 6. The Chinese menu shows that the recording time is available for evidence. 7. Built-in 300mAh large lithium battery, over 90 hours standby time. 8. Size: 110x34x13mm 9. Net weight: 49g