This is the Sony ICD-UX512 digital voice recorder (blue). It has 2GB of internal flash memory. It can record in MP3 format. It has a built-in USB connection, allowing you to transfer files directly to your computer without a cable. The memory can be expanded with a microSD card slot. The product has been tested and is in good working order. Recording and playback have been confirmed. The product functions normally. Due to being a used item, there may be some minor scratches and stains from use. Thank you for viewing our product.