I stored it in its box after using it a few times. The OLYMPUS Voice Trek DM-750 features 2-microphone noise cancellation and supports PCM and MP3 recording. - Brand: OLYMPUS - Model: Voice Trek DM-750 - Storage: 4GB - Recording Formats: PCM, MP3 - Connectivity: USB - Features: 2-microphone noise cancellation - Supported OS: WIN, MAC Thank you for looking.