High-definition sound quality: The upgraded digital recorder has a higher sensitivity noise reduction microphone and has a professional recording chip, you can achieve stereo high-definition recording and enjoy high-quality sound quality. Recorder with playback and built-in speaker.Voice-controlled recorder: The recording device has different levels of voice decibels. First you need to set the recorder to voice-controlled recording. When the sound reaches above the standard decibel, the recorder can capture the sound. If the decibel is lower than the standard, the recorder will stop, which can reduce space and whisper fragments. 16GB Capacity and Rechargeable Battery: Built-in 16GB storage capacity, high quality (192 kbps): 256 hours; (128 kbps): 280 hours; short playback (64 kbps): 560 hours; long playback (32 kbps): 1120 hours, recording files up to 199 files, you can control the storage capacity as needed, and equipped with a rechargeable 3.6V 300mah lithium battery, each full charge, supports 20 hours of continuous recording and 8 hours of headphone playback.Easy to operate, more functions: Simple three-button recording, saving and playback, simple operation allows you to quickly record without delay, with A-B repeat function, this function is especially suitable for classroom learning and important meetings, which can help you listen to key information repeatedly. There are also variable playback speed, password protection, timestamp naming files, easy to find recorded files.Convenient file transfer and MP3 player: The recorder supports recording files in MP3/WAV format. You can transfer or download files from your computer via the provided Micro USB cable. It is not only a recorder, but also an MP3 player. You can relax yourself at any time after tired study, class or meeting. We ensure your 100% satisfactory purchase experience.