This Sony Digital Voice Recorder features a built-in USB for easy file transfer, a 4GB internal memory, and a micro SD card slot for expanded storage up to 32GB. It utilizes an S-microphone system for clear capture of distant or quiet sounds, with Focus and Wide-Stereo recording options. The recorder supports both Linear PCM and MP3 formats for recording and playback. Auto Voice Recording minimizes background noise and enhances vocal clarity, while transcription playback with Digital Pitch Control aids in reviewing recordings. It also includes a low-cut filter to reduce unwanted background noise and offers extra-long battery life, lasting up to 55 hours on a single AAA battery. Calendar Search helps you quickly find recordings by date.