Olympus presents a trio of WS series digital voice recorders, including WS-510M, WS-500M and WS400S. All of them have a large 1.23-inch LCD display and a retractable USB port.
Olympus WS-510M (Left) and WS-500M (Right) come with 4GB and 2GB internal memory. They record in WMA format and support playback of MP3, WMA and WAV files. They have built-in 16 mm round dynamic speaker and SRS WOW XT technology is included.
Olympus WS400S is a basic voice recorder with 1GB memory. Olympus WS-510M, WS-500M and WS400S are priced at $149.99, $99.99 and $79.99 respectively.