Features: brand new and high quality Built-in high capacity rechargeable battery, fully charged, it can record continuously for about 20hours. The voice recorder have high quality recording microphones with intelligent dynamic noise reduction, providing you with a full clear recordings and playback easily. Voice activated recorder is suitable for a business meeting, lecture class, conference, travelling, investigation or evidence . It's very small you can take it anywhere. There is a sound, start recording. Stop recording without sound, improve efficiency and save memory. You can use it as a hidden recorder in your pocket to secretly record live conversations without anyone realizing it,without sound and light. Specifications: Built-in Memory: 4G,8G,16G, 32G,(Optional) Size:39X6mm/1.54x0.24in Material:Zinc Alloy Color:Black Recoding Distance: About 16.40Feet/5m USB 2.0 Port Continuous Recording Time: About 20hours Playing Time:About 8hours Battery Capacity:110mAh Recording Format: MP3,WMA,WAV Sampling Rate: 192Kbps Package Includes: 1x Voice Activated Recorder 1x Cable 1x Earphone 1x Manual note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.