Item Type: Digital Voice RecorderMaterial: Zinc AlloyRecording Format: WAV, MP3Music Format: MP3, WMA, WAV, OGG, APE, FLAC, AAC, Etc.Built in Polymer Lithium Battery: 170mAhPackage List1 x Recorder1 x Instruction Manual1 x Charging Cable1 x Headphone1NOISE REDUCTION: Digital voice recorder uses an eight core AI intelligent professional noise reduction chip to solve the problem of weak sound, improve recording stability and clearly restore the real sound. 2VOICE ACTIVATED RECORDING: MP3 recorder automatically records when there is sound, saving storage space as much as possible and saving time for playing and filtering useless content. 3ONE CLICK RECORDING: Voice activated recorder one click power on or off, one click recording easy to operate, to prevent misuse do not miss the key moment of the recording opportunity. 4VARIABLE SPEED PLAYBACK: When playing back recordings or learning, you can set multi level speed changes for quick memory during file analysis and learning. 5SEGMENT RECORDING: Noise reduction recorder has a segmentation function that automatically segments the recorded files according to the recording time and stores them as one file every 5 hours.