1536kbps Recorder: The voice recorder can record high quality audio recordings at 1536kbps with its dual microphones with dynamic noise reduction. External microphone is supported. External speakers play loud and clear sound. The digital recorder can also be used as an MP3 player and file storage by being compatible with Mac and Windows. The dictaphone suitable for lectures, meetings, interviews, lessons, etc. 16GB Dictaphones:The internal memory of 16GB recorder can store recording files (Vocal Mode) from 12 hours (WAV 1536 kbps) to 1160 hours (MP3 32kbps) or 2000 songs (Music Mode). Built-in 400mAh rechargeable battery, supports up to 30 hours of continuous recording after 3 hours fully charged. Charges or transfers files via the supplied micro-USB cable. Can also use OTG converter to manage files on your Android phone. AVR - Voice Activated Recording: This recorder has 7 different voice decibel levels. When the "AVR" mode is activated, the sound will be detected automatically during recording. When the sound reaches a certain standard, it automatically recorded, if it falls below the standard, it automatically stops. This can reduce wastage of recording capacity. Note: You need to set the "AVR" function in the "Configuration" to get this function. One-Button Recording: Simple one-button operation to record or record. Turn on the audio recorder and slide the "REC" button up to start recording. When done, slide the SAVE" button down and the recording will be saved. The voice recorder supports 7 language variants (including French), also has the functions of auto-save, AB repeat, timestamp, timed recording, etc.