Features: Excellent Recording Quality - Built-in noise reduction microphone, support WAV or MP3 format recording and maximum 1536kbps (WAV) sound quality. With 8GB storage capacity, it can save 572hrs records. Intelligent Recording Function - One click recording, easy to start work. Support voice control, automatic recording when there is sound, automatic pause when there is no sound. With password function to protect your record files. Multiple Playback Modes - Support list loop, random play, Sequential play, single loop. 3.5mm jack headphones to listen to lossless HD sound quality! It can set 6 play modes. Also has the function of repeat reading, and it will be played repeatedly at the two time points of A and B. High Capacity Battery - Built-in 410mAh battery, able to continuously record 40hrs after full charged. Available to set the Timed shutdown to save the power. Easy to Use and More Setting - Support for USB 2.0 computer connections for easy uploading and downloading of voice or music. Support setting time and date, and screen and backlight brightness to adjust. Wide Applications - Ideal for your business meetings, negotiations, interviews, presentations, conferences, semester classes, presentations, group discussions, etc., accurately record all the details. Specification: Model: 991 Color: Black Size: 85x36x11mm Weight: 45g Memory Capacity: 8G Display Size: 0.9" dot matrix display Resolution 96*64 LCD Recording Format: WAV/MP3 Recording Method: MIC Record Record Storage Time: WAV: 12hrs(1536kbps),18hrs(1024kbps), 24hrs(768kbps),36hrs(512kbps) MP3: 96hrs(192kbps), 143hrs(128kbps), 284hrs(64kbps), 572hrs(32kbps) Music formats: MP3, WMA, FLAC APE, OGG Interface type: USB2.0 Service temperature: 0 to 45 degrees Celsius Power supply: Built-in lithium polymer Battery capacity: 410mAh Package Size: 15.2x7.8x3.7cm/5.9x3x1.4in Package Weight: 125g/4.4oz Package List: 1 x Voice Recorder 1 x Earphone 1 x Data Cable 1 x User Manual