4 GB internal memory, expandable to 32 GB with micro SD S-microphone system records distant or quiet sounds clearly Focus and Wide-Stereo recording captures the voices you want to hear Auto voice recording reduces background noise Built-in USB connector makes transferring files easy – no USB cable needed. Key Features Record MP3 audio and play it back through a 300mW speaker Long battery life enables up to 32hrs recording (MP3 8kbps) 4GB of memory lets you store up to 1043hrs (MP3 8kbps) Organise, protect, and delete files and folders