Olympus voice recorder. Model: WS-853rd Material: Plastic. Supported Digital Audio Standards: MP3. Type of digital reproduction: Flash based. Accessories: USB cable. OS Required: Apple MacOS X 10.5 to 10.9, Microsoft Windows Vista / 7/8 / 8.1. Battery Life Details Digital recording - up to 110 hours / ¦ Digital playback - up to 90 hour / s duration (max):. 110 hours / s Additional functions: Hold button, on / off switch, built-in speaker, low-cut filter, built-in microphone, built-in folding stand.. Recording Time: 130 Hours - MP3 Recording - 128 kbps, 260 hours - MP3 Recording - 64 kbps, 2080 hours - MP3 recording - 8 kbps. Connector Type: Microphone ¦ Headphones ¦ Hi-Speed USB (USB Type A 4-pin). Color: Black.