Features: This device works as a voice recorder and a MP3 player. With an external microphone, you can also use it as a digital voice recorder for recording lectures, meetings, interviews. Ultra-low power circuit design to achieve long time recording,working continuously for up to 72 hours or more. USB connection allows you to upload and download the voice files. With built-in loudspeaker, you also can enjoy music or recorded voice without an earphone or speaker. Specification: Color: Silver Shell material: Zn-Mg Alloy Size: 9.2 x 5 x 1.1 cm L x W x H Memory capacity: 8GB Expanded memory: TF card expanded up to 64GB, card is not included Recording format: WAV/MP3 Music Format: FLAC/APE/OGG/MP3/WMA LED Display: 2.0 inch Record Distance: 3-20m USB cable length: Approx. 70cm Bit Rate: 1536Kbps Max Record File Number: 999 Battery: Built-in 850mAh battery Recording hours: 72hours based on power amount and recording mode Standby hours: 300hours Rewinding/ PREV function: Support A-B repeating function: Support Fast forward: Support LINE IN: Support Model Number:--- Record Audio Format:MP3 Package:Yes External Memory:Yes With Speakers:Yes Playback Formats:MP3 Balanced Out:Yes External Microphone:Yes Voice Activated Recording:Yes Dimensions WxHxD:---- Package List: 1x Voice Recorder 1x Charger Cable 1x User Manual