Feature: 1. Noise Reduction: The digital voice recorder uses the digital intelligent noise reduction technology and 2 omnidirectional stereo microphones, can provide HiFi sound quality. 2. Automatic Voice Detection: Built in automatic voice detection function, automatic recording and saving, no silent fragments or whispers in the recording, saving space and time. 3. Smart Design: The portable voice recorder has smart battery detection automatically saves the current recording when the battery runs out, without worrying about file loss. 4. Large Capacity: This sound recording device has a large capacity to store 800 hours of recording files or 30,000 songs, easily transfers files to your computer via the included USB cable. 5. Versatile Application: This noise reduction voice recorder is more than just a small recorder, it supports writing and can also be used as a U disk, easy to use, record, save, and play with one click. The clip is designed for easy wearing on your jacket or book. Specification: Item Type: Digital Voice Recorder Model: Q91 Material: Aluminum Alloy, Electronics Battery Type: Built in 300mAh Lithium Battery (Included) . Package List: 1 x MP3 Player Recorder1 x Wired Earphones1 x Charging Cable3 x Replacement Core1 x User Manual