DSP Digital Noise Reduction Technology: Effectively filters and attenuates noise in different occasions to accurately capture the original sound. Humble Appearance: Just like an ordinary ballpoint pen, allows you to hide it in your hand, a drawer or a cloth pocket, making it discreet and unobtrusive. Power Failure Storage Design: Detect low battery and automatically save recording files, which can prevent data loss inside. 8GB Flash Memory: Store 96 hours of WAV audio recordings. 48 kHz sound sampling rate and 192 kbps recording bit rate produce excellent sound recordings in any situation. Time stamp design: It can automatically name recording files by date, allowing you to search and browse files. Product size: 134*12 (mm) Product color: black Delivery quantity: One piece