1536Kbps Dual Microphones and PCM Clear RecordingThe Vivaniir digital recorder is equipped with dual sensitive microphones and dynamic DSP noise reduction technology, supporting up to 1536Kbps PCM recording for excellent crystal clear sound.64GB Massive Memory and 330 Days StorageWith the support of 64GB massive internal memory, it allows you to record freely without worrying about insufficient memory.Extra-long Recording and 1100mAh Powerful BatteryAfter fully charged via the USB Type-C interface, the long battery life recorder can maintain ultra-long continuous recording.Simple and PowerfulEasy to understand, slide the recording button up: start recording; slide down: save recording. This metal shell recorder with playback function also has the following functions: password, timed recording, line input...Voice Activated RecorderTurn on the AVR voice activation function to record only when speaking, reduce silence and whispering fragments, save memory and power. Easily record your meetings, interviews, speeches, classes, lectures.Variable Speed Playback and A-B RepeatLanguage learners can adjust the playback speed of the recording to listen to the pronunciation and intonation of each word. The "A-B Repeat" function allows listening to a specific sentence or paragraph repeatedly, which helps to better understand and learn a foreign language.