The Olympus VN-8100PC is a digital recorder that can be used by individuals who are blind or have low vision. This portable recorder has 2 gigabytes (GB) of built-in flash memory and features between 22.50 and 91.50 hours of recording time for MPEG1/MPEG2 Layer 3 (MP3) format; for Windows Media Audio (WMA) format: 134 hour using HQ mode, 264 hours using SP mode, and 843 hours using LP mode. The overall frequency responses are between 40 Hertz (Hz) and 14 kiloHertz (kHz) during recording mode using built-in microphone; between 70 Hz and 19 kHz during recording or playback mode for MP3 format; for WMA format: between 70 Hz and 13 kHz using HQ mode, between 70 and 8 kHz using SP mode, and between 70 Hz and 3 kHz using LP mode. Other features include a backlit light emitting diode (LED) liquid crystal display (LCD) screen with font size setting, USB interface, five folders (200 messages per folder), a built-in 28-millimeter (mm) round dynamic speaker, a 3.5-mm microphone jack, and a 3.5-mm headphone jack. The "Scene Selection" function automatically adjusts the microphone to capture the best sound. The "Voice Activation" function records only when the microphone senses sound. "Index Marks" allow the user to electronically mark when each file begins. Available languages include English, French, Spanish and Portuguese. OPTIONS: Carry case, headphones, microphones, Ni-MH battery pack, foot switch software, Foot Switch (RS-27), PC Transcription Kit (AS-2400), wrist straps, and neck straps. COMPATIBILITY: For use with IBM and compatible computers or Apple Macintosh computers with a USB port. SYSTEM REQUIREMENTS: Microsoft Windows XP, Vista or Windows 7 or Mac OS X 10.4.11 to 10.6. POWER: Uses two AAA alkaline (LR03 or R03) batteries (included) or two AAA Ni-MH rechargeable batteries (not included). Battery life for alkaline battery is 32 hours for MP3 and 51 hours for WMA LP during recording mode using built-in microphone, 17 hours for MP3 and 20 hours for WMA LP during playback mode using built-in speaker, and 37 hours for MP3 and 44 hours for WMA LP during playback using headphone; for Ni-MH rechargeable battery is 25 hours for MP3 and 40 hours for WMA LP during recording mode using built-in microphone, 14 hours for MP3 and 16 hours for WMA LP during playback mode using built-in speaker, and 30 hours for MP3 and 34 hours for WMA LP during playback using headphone. DIMENSIONS (WxHxD): 4.3 x 1.5 x 0.7 inches. WEIGHT: 2.3 ounces with batteries.