High Quality Clear Recording: This voice recorder adopts upgraded noise-canceling microphone and professional recording chip. It can capture 1536Kbps high quality sound, as if the speaker is standing right next to you. You can also turn on the monitor function to listen to the recording of the recorder device in real time. It is the best choice for people who record and store lectures, meetings, classes and interviews etc.64GB Large Memory: The 64 GB digital voice recorder has a large amount of memory and storage space and can last up to 280 hours of recording at 512 kbps. Built in rechargeable battery can support up to 25 hours of continuous recording (512kbps non-noise canceled mode) and the recording format can be pre-set to mp3 32kbps,128kbps or wav 1536kbps, new tape recorder devices default to 512kbps wav recording.Voice Activated Recorder: This portable audio recorder allows you to set the voice decibel level to 7 different levels. When the voice control function is turned on, the recorder automatically starts recording only when the sound reaches the correct voice decibel level, reducing gaps and whispered phrases, saving storage space and listening time. Also has a friendly prompts and recording file auto-save function in case of low battery, A-B repeat.Variable Playback Speed: Variable speed range from -7 to 7, total 15 levels to adjust the playback speed (only support MP3 format). Fast playback to quickly jump to the playback point you want and save waiting time; Slow playback to hear every word clearly you want.Password Protection: You can set a 4-digit password without which no one can turn on the audio recorder and listen to your recording files. Ensure your valuable data is protected best. Even if you forget your password, it doesn't matter, Super Password can help you reset your password.