Portable Recording Studio - Universal - Mini Activation Tape Recorder Digital Audio Voice Micro Voice Recorder Small Secret Professional USB Memory | Digital Sound Recorder(Black) Highlights Universal Sound Recorder Mini Activation Digital Audio Voice Mic Sound Recorder Small Secret Professional USB Memory | Digital Tape Recorder(Black) Voice Recorder Mini Record Enabled Dictaphone Micro Sound Audio Digital Small Secret USB Prestrore | Digital Voice Recorder Multi-Function Messaging Recorder One-Click Recording Sound Activated Recording Noise Reduction Files can be deleted directly from the recorder. Timestamp Save files automatically when power is lost Encryption digits Sound activated recording When the sound is above 30 decibels, the recorder starts recording, when the sound is below 30 decibels, the recorder stops recording.Record the power and memory of the recorder (this function can be turned on or off, if you need help, please check the user manual or contact StTwunake customer. When the sound is above 30dB When the sound is less than 30dB Listen to the sound of the stage Built-in high-definition large-caliber condenser microphone, as long as the human ear can hear the sound, the recorder can record Full 360 pickup Highly sensitive microphone