DUAL-CORE PROCESSOR NOISE REDUCTION: Voice recorder using professional DSP acoustic processor, built-in intelligent noise reduction chip, directly filter the surrounding noise, abilitiy to capture recording content accurately and clearly.THREE ULTRA-SENSITIVE MICROPHONES: The maximum sound sampling rate of this voice recorder is 1536Kbps and supports recording distances up to 50 meters. Great voice recorder for lectures, conferences, interviews, classes, conversations and concerts with ultra-sensitive microphones.VOICE-ACTIVATED RECORDING: The recording can be activated by sound, the silent segment can be omitted to save the storage space. You can use the earphone to listen to your sound while recording, the recorder function simultaneously as a hearing aid.POWERFUL AND EASY TO OPERATE:Our digital recorder supports both MP3 and WAV format file which can be easily transferred to MAC or PC. With the free OTG converter, you can also connect voice recorder to your mobile phone; recording files saved with time stamp; one switch to record, save and delete. Audio recorder has metal solid case, lightweight and it is portable.