Record MP3 audio quickly and simply with this Sony digital voice recorder. It features a high-speed USB direct connection for fast file transfer and an optimized voice recorder that reduces ambient noise for clearer recordings. Scene select allows you to optimize settings for music, meetings, and more. The device has 4 GB of built-in memory, which can be expanded with an SD card slot. The 4 GB memory stores up to 59 hours and 35 minutes of recording (MP3 128 kbps stereo). Enjoy long battery life, enabling up to 55 hours of recording (MP3 128 kbps stereo), powered by 2 x AAA batteries (supplied).