JNN C5 HD Noise Reduction Smart Recording Electronic Bracelet 1. Battery capacity: 300mAh 2. Charging time: about 2h 3. Recording time: 50-60h 4. Standby time: about 30 days 5. Recording format: WAV 6. Simple operation, one-click recording 7. Using a highly sensitive condenser microphone, 360-degree surround pickup, making the sound clearer 8. Use acoustic DSP noise reduction module to filter noise from the source 9. Intelligent voice-activated recording to save storage space as much as possible 10. Free speech-to-text conversion with an accuracy of about 96% 11. Automatically record the recording start time for easy browsing and management 12. Support password setting to protect data security 13. Plug in the matching wire-controlled headset to delete files locally 14. Strong battery life, up to 30 days of standby time 15. Automatically protect files when power is turned off to prevent them from being lost. 16. Support OTG connection to mobile phone, plug and play, simple and convenient